diff --git a/server/README.md b/server/README.md
index 2492aaa..7df3b44 100644
--- a/server/README.md
+++ b/server/README.md
@@ -7,11 +7,17 @@ fastapi dev main.py
 ```
 
 # Best Practice
+
+**To alpha-2 switch to**
+## SQLEModel-boilerplate
+https://github.com/benavlabs/SQLModel-boilerplate/tree/main
+
+-----
+
 ## Simple Boilerplate
 https://github.com/anthonycepeda/fastapi-sqlmodel/tree/main
 
 ## Global Boilerplate
 https://github.com/zhanymkanov/fastapi-best-practices?tab=readme-ov-file#excessively-use-pydantic
 
-## SQLEModel-boilerplate
-https://github.com/benavlabs/SQLModel-boilerplate/tree/main
+
diff --git a/server/src/knowledges/router.py b/server/setup.py
similarity index 100%
rename from server/src/knowledges/router.py
rename to server/setup.py
diff --git a/server/src/app.py b/server/src/app.py
deleted file mode 100644
index bff65bb..0000000
--- a/server/src/app.py
+++ /dev/null
@@ -1,27 +0,0 @@
-from contextlib import asynccontextmanager
-from fastapi import FastAPI
-
-from src.database import create_db_and_tables
-#TODO : best practice to manage models import
-from src.questions.models import Question
-from src.knowledges.models import Knowledge
-from src.metrics.models import Metric
-
-#Test
-from src.questions.controller import create_question, read_question
-from src.knowledges.controller import create_knowledge, read_knowledges, delete_knowledge
-
-#TODO : alternative @app.on_event("startup") ?
-@asynccontextmanager
-async def lifespan(app: FastAPI):
-    #startup
-    create_db_and_tables()
-    delete_knowledge()
-    yield
-    #shutdown
-
-app = FastAPI(lifespan=lifespan)
-
-@app.get("/")
-async def root():
-    return {"message": "Hello World"}
\ No newline at end of file
diff --git a/server/src/metrics/router.py b/server/src/app/__init__.py
similarity index 100%
rename from server/src/metrics/router.py
rename to server/src/app/__init__.py
diff --git a/server/src/app/__pycache__/__init__.cpython-311.pyc b/server/src/app/__pycache__/__init__.cpython-311.pyc
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index 0000000..66ff341
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diff --git a/server/src/app/__pycache__/database.cpython-311.pyc b/server/src/app/__pycache__/database.cpython-311.pyc
new file mode 100644
index 0000000..0079941
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diff --git a/server/src/app/__pycache__/faker_seed.cpython-311.pyc b/server/src/app/__pycache__/faker_seed.cpython-311.pyc
new file mode 100644
index 0000000..0acdbaf
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diff --git a/server/src/app/__pycache__/main.cpython-311.pyc b/server/src/app/__pycache__/main.cpython-311.pyc
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index 0000000..eec9226
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diff --git a/server/src/knowledges/__pycache__/crud.cpython-311.pyc b/server/src/app/crud/__pycache__/crud_knowledges.cpython-311.pyc
similarity index 64%
rename from server/src/knowledges/__pycache__/crud.cpython-311.pyc
rename to server/src/app/crud/__pycache__/crud_knowledges.cpython-311.pyc
index 58bc112..cd24307 100644
Binary files a/server/src/knowledges/__pycache__/crud.cpython-311.pyc and b/server/src/app/crud/__pycache__/crud_knowledges.cpython-311.pyc differ
diff --git a/server/src/app/crud/__pycache__/crud_metrics.cpython-311.pyc b/server/src/app/crud/__pycache__/crud_metrics.cpython-311.pyc
new file mode 100644
index 0000000..db7e475
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diff --git a/server/src/app/crud/__pycache__/crud_questions.cpython-311.pyc b/server/src/app/crud/__pycache__/crud_questions.cpython-311.pyc
new file mode 100644
index 0000000..eb76b0b
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diff --git a/server/src/knowledges/crud.py b/server/src/app/crud/crud_knowledges.py
similarity index 90%
rename from server/src/knowledges/crud.py
rename to server/src/app/crud/crud_knowledges.py
index d0d2e57..edd06a5 100644
--- a/server/src/knowledges/crud.py
+++ b/server/src/app/crud/crud_knowledges.py
@@ -1,12 +1,13 @@
 from sqlmodel import Session, select
 
-from src.knowledges.models import Knowledge
-from src.database import engine
+from src.app.models.knowledge import Knowledge
+from src.app.database import engine
 
 def create_knowledge(knowledge: Knowledge):
     with Session(engine) as session:
         session.add(knowledge)
         session.commit()
+    return knowledge
 
 def read_knowledges():
     with Session(engine) as session:
@@ -38,5 +39,4 @@ def delete_knowledge(knowledge_id: int):
     with Session(engine) as session:
         knowledge = session.get(Knowledge, knowledge_id)
         session.delete(knowledge)
-        session.commit()
-        #TODO : delete join questions
\ No newline at end of file
+        session.commit()
\ No newline at end of file
diff --git a/server/src/metrics/crud.py b/server/src/app/crud/crud_metrics.py
similarity index 76%
rename from server/src/metrics/crud.py
rename to server/src/app/crud/crud_metrics.py
index 6077527..781f21a 100644
--- a/server/src/metrics/crud.py
+++ b/server/src/app/crud/crud_metrics.py
@@ -1,14 +1,14 @@
 from sqlmodel import Session, select
 
-from src.metrics.models import Metric
-from src.questions.models import Question
-from src.database import engine
+from src.app.models.metric import Metric
+from src.app.models.question import Question
+from src.app.database import engine
 
-def create_metric(Metric: Metric):
+def create_metric(metric: Metric):
     with Session(engine) as session:
-        session.add(Metric)
+        session.add(metric)
         session.commit()
-
+    return metric
         
 def read_metrics(question):
     with Session(engine) as session:
diff --git a/server/src/questions/crud.py b/server/src/app/crud/crud_questions.py
similarity index 83%
rename from server/src/questions/crud.py
rename to server/src/app/crud/crud_questions.py
index 0eae63d..a95f316 100644
--- a/server/src/questions/crud.py
+++ b/server/src/app/crud/crud_questions.py
@@ -1,14 +1,14 @@
 from sqlmodel import Session, select
 
-from src.questions.models import Question
-from src.knowledges.models import Knowledge
-from src.database import engine
+from src.app.models.question import Question
+from src.app.models.knowledge import Knowledge
+from src.app.database import engine
 
-def create_question(Question: Question):
+def create_question(question: Question):
     with Session(engine) as session:
-        session.add(Question)
+        session.add(question)
         session.commit()
-
+    return question
         
 def read_questions(knowledge):
     with Session(engine) as session:
diff --git a/server/src/database.py b/server/src/app/database.py
similarity index 100%
rename from server/src/database.py
rename to server/src/app/database.py
diff --git a/server/src/app/faker_seed.py b/server/src/app/faker_seed.py
new file mode 100644
index 0000000..5a31d65
--- /dev/null
+++ b/server/src/app/faker_seed.py
@@ -0,0 +1,39 @@
+from src.app.models.knowledge import Knowledge
+from src.app.crud.crud_knowledges import create_knowledge, read_knowledges, read_knowledge, update_knowledge, delete_knowledge
+from src.app.models.question import Question
+from src.app.crud.crud_questions import create_question, read_questions, read_question
+from src.app.models.metric import Metric
+from src.app.crud.crud_metrics import create_metric
+
+def faker():
+    knowledge1 = Knowledge(content="La connaissance est une notion aux sens multiples, à la fois utilisée dans le langage courant et objet d'étude poussée de la part des sciences cognitives et des philosophes contemporains. ", uri="https://fr.wikipedia.org/wiki/Connaissance")
+    knowledge2 = Knowledge(content="faculté mentale produisant une assimilation par l'esprit d'un contenu objectif préalablement traduit en signes et en idées ;", uri="https://fr.wikipedia.org/wiki/Connaissance#D%C3%A9finition")
+    knowledge3 = Knowledge(content="Pour l'anthropologue, la première connaissance est celle que les hommes ont d'eux-mêmes et de leur environnement, et qui, dans les sociétés primitives, assure leur survie quotidienne.", uri="https://fr.wikipedia.org/wiki/Connaissance#En_anthropologie")
+    
+    create_knowledge(knowledge1)
+    create_knowledge(knowledge2)
+    create_knowledge(knowledge3)
+
+    question1 = Question(knowledge = knowledge1, question = "Quel est le sens du mot connaissance ?")
+    question2 = Question(knowledge = knowledge1, question = "Quel est la nature de la connaissance ?")
+    question3 = Question(knowledge = knowledge1, question = "Quel est le moyen de la connaissance ?")
+    question4 = Question(knowledge = knowledge2, question = "Qu'est ce qu'une faculté mentale ?")
+    question5 = Question(knowledge = knowledge3, question = "Qu'est ce qu'une connaissance pour l'anthropologue ?")
+
+    create_question(question1)
+    create_question(question2)
+    create_question(question3)
+    create_question(question4)
+    create_question(question5)
+
+    metric1 = Metric(question = question1, need_index = 89)
+    metric2 = Metric(question = question2, need_index = 28)
+    metric3 = Metric(question = question3, need_index = 12)
+    metric4 = Metric(question = question4, need_index = 59)
+    metric5 = Metric(question = question5, need_index = 91)
+
+    create_metric(metric1)
+    create_metric(metric2)
+    create_metric(metric3)
+    create_metric(metric4)
+    create_metric(metric5)
diff --git a/server/src/app/main.py b/server/src/app/main.py
new file mode 100644
index 0000000..2be1c3d
--- /dev/null
+++ b/server/src/app/main.py
@@ -0,0 +1,26 @@
+from contextlib import asynccontextmanager
+from fastapi import FastAPI
+
+from src.app.database import create_db_and_tables
+#TODO : best practice to manage models import
+from src.app.models.question import Question
+from src.app.models.knowledge import Knowledge
+from src.app.models.metric import Metric
+
+#Test
+from src.app.faker_seed import faker
+
+#TODO : alternative @app.on_event("startup") ?
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    #startup
+    create_db_and_tables()
+    faker()
+    yield
+    #shutdown
+
+app = FastAPI(lifespan=lifespan)
+
+@app.get("/")
+async def root():
+    return {"message": "Hello World"}
\ No newline at end of file
diff --git a/server/src/knowledges/__pycache__/models.cpython-311.pyc b/server/src/app/models/__pycache__/knowledge.cpython-311.pyc
similarity index 76%
rename from server/src/knowledges/__pycache__/models.cpython-311.pyc
rename to server/src/app/models/__pycache__/knowledge.cpython-311.pyc
index f942fba..728ab7f 100644
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diff --git a/server/src/app/models/__pycache__/metric.cpython-311.pyc b/server/src/app/models/__pycache__/metric.cpython-311.pyc
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index 0000000..2b00308
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diff --git a/server/src/app/models/__pycache__/question.cpython-311.pyc b/server/src/app/models/__pycache__/question.cpython-311.pyc
new file mode 100644
index 0000000..f83ea23
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diff --git a/server/src/knowledges/models.py b/server/src/app/models/knowledge.py
similarity index 100%
rename from server/src/knowledges/models.py
rename to server/src/app/models/knowledge.py
diff --git a/server/src/metrics/models.py b/server/src/app/models/metric.py
similarity index 57%
rename from server/src/metrics/models.py
rename to server/src/app/models/metric.py
index fdafd4f..75a72ad 100644
--- a/server/src/metrics/models.py
+++ b/server/src/app/models/metric.py
@@ -1,7 +1,12 @@
-from sqlmodel import Field, SQLModel
+from sqlmodel import Field, SQLModel, Relationship
+from src.app.models.question import Question
+
 #TODO : add pydantic validation
 
 class Metric(SQLModel, table=True):
     id: int | None = Field(default=None, primary_key=True)
+    
     question_id: int | None = Field(default=None, foreign_key="question.id", ondelete="CASCADE")
+    question: Question | None =  Relationship(back_populates="metrics")
+    
     need_index: int
diff --git a/server/src/questions/models.py b/server/src/app/models/question.py
similarity index 71%
rename from server/src/questions/models.py
rename to server/src/app/models/question.py
index 923ebe7..4da7d02 100644
--- a/server/src/questions/models.py
+++ b/server/src/app/models/question.py
@@ -1,5 +1,5 @@
 from sqlmodel import Field, SQLModel, Relationship
-from src.knowledges.models import Knowledge
+from src.app.models.knowledge import Knowledge
 #TODO : add pydantic validation
 
 class Question(SQLModel, table=True):
@@ -9,4 +9,4 @@ class Question(SQLModel, table=True):
     knowledge_id: int | None = Field(default=None, foreign_key="knowledge.id", ondelete="CASCADE")
     knowledge: Knowledge | None =  Relationship(back_populates="questions")
 
-    metrics: list["Metrics"] = Relationship(back_populates="question", cascade_delete=True) # type: ignore
+    metrics: list["Metric"] = Relationship(back_populates="question", cascade_delete=True) # type: ignore
diff --git a/server/src/knowledges/__pycache__/controller.cpython-311.pyc b/server/src/knowledges/__pycache__/controller.cpython-311.pyc
deleted file mode 100644
index 9e8776d..0000000
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diff --git a/server/src/knowledges/__pycache__/cruds.cpython-311.pyc b/server/src/knowledges/__pycache__/cruds.cpython-311.pyc
deleted file mode 100644
index 652e680..0000000
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diff --git a/server/src/knowledges/controller.py b/server/src/knowledges/controller.py
deleted file mode 100644
index d9b05e7..0000000
--- a/server/src/knowledges/controller.py
+++ /dev/null
@@ -1,19 +0,0 @@
-from src.knowledges.models import Knowledge
-from src.knowledges.crud import create_knowledge as create_knowledge_model, read_knowledges as read_knowledges_model, read_knowledge as read_knowledge_model, update_knowledge as update_knowledge_model, delete_knowledge as delete_knowledge_model
-
-def create_knowledge():
-    connaissance = Knowledge(content="La connaissance n'est pas.", uri="https://perdu.fr")
-    create_knowledge_model(connaissance)
-    return read_knowledges()[-1]
-
-def read_knowledges():
-    return read_knowledges_model()
-
-def read_knowledge(knowledge_id):
-    return read_knowledge_model(knowledge_id)
-
-def update_knowledge():
-    return update_knowledge_model(2, "faculté mentale produisant une assimilation par l'esprit d'un contenu objectif préalablement traduit en signes et en idées ;", "https://fr.wikipedia.org/wiki/Connaissance#D%C3%A9finition")
-
-def delete_knowledge():
-    return delete_knowledge_model(7)
diff --git a/server/src/metrics/__pycache__/models.cpython-311.pyc b/server/src/metrics/__pycache__/models.cpython-311.pyc
deleted file mode 100644
index 95351cb..0000000
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diff --git a/server/src/questions/__pycache__/controller.cpython-311.pyc b/server/src/questions/__pycache__/controller.cpython-311.pyc
deleted file mode 100644
index b8d4cf3..0000000
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diff --git a/server/src/questions/__pycache__/crud.cpython-311.pyc b/server/src/questions/__pycache__/crud.cpython-311.pyc
deleted file mode 100644
index 5ce8e5d..0000000
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diff --git a/server/src/questions/__pycache__/models.cpython-311.pyc b/server/src/questions/__pycache__/models.cpython-311.pyc
deleted file mode 100644
index 4450c54..0000000
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diff --git a/server/src/questions/controller.py b/server/src/questions/controller.py
deleted file mode 100644
index 70e0aa6..0000000
--- a/server/src/questions/controller.py
+++ /dev/null
@@ -1,13 +0,0 @@
-from src.questions.models import Question
-from src.questions.crud import create_question as create_question_model, read_questions as read_questions_model, read_question as read_question_model
-from src.knowledges.models import Knowledge
-
-def create_question(knowledge: Knowledge):
-    question = Question(knowledge = knowledge, question = "Quel est le sens du mot connaissance ?")
-    create_question_model(question)
-
-def read_questions(knowledge):
-    return read_questions_model(knowledge)
-
-def read_question(question_id):
-    return read_question_model(question_id)
\ No newline at end of file
diff --git a/server/src/questions/router.py b/server/src/questions/router.py
deleted file mode 100644
index e69de29..0000000
diff --git a/server/src/questions/service.py b/server/src/questions/service.py
deleted file mode 100644
index e69de29..0000000
diff --git a/server/src/questions/utils.py b/server/src/questions/utils.py
deleted file mode 100644
index e69de29..0000000