db_uri and code clean

backend/environment.env

@@ -0,0 +1 @@
+DB_HOST=sqlite:///path/to/your/database.db

backend/project/__init__.py

@@ -2,23 +2,27 @@
 This file is the base of the Flask API. It contains the basic structure of the API.    
 """
 
-from os import getenv
-from dotenv import load_dotenv
 from flask import Flask
 from flask_sqlalchemy import SQLAlchemy
 from .endpoints.index import index_bp
 
+db = SQLAlchemy()
+
 def create_app():
     """
     Create a Flask application instance.
     Returns:
         Flask -- A Flask application instance
     """
-    db = SQLAlchemy()
-    load_dotenv()
+
     app = Flask(__name__)
-    app.config['SQLALCHEMY_DATABASE_URI'] = getenv('DB_HOST')
     app.register_blueprint(index_bp)
-    db.init_app(app)
 
     return app
+
+def init_db(db_uri):
+    """Initialize the database with the given uri"""
+    app = create_app()
+    app.config["SQLALCHEMY_DATABASE_URI"] = db_uri
+    db.init_app(app)
+    return app

backend/project/__main__.py

@@ -1,9 +1,12 @@
 """Main entry point for the application."""
 from sys import path
-from project import create_app
+from os import getenv
+from project import init_db
+from dotenv import load_dotenv
 
 path.append(".")
 
 if __name__ == "__main__":
-    app = create_app()
+    load_dotenv(dotenv_path='environment.env')
+    app = init_db(getenv("DB_HOST"))
     app.run(debug=True)