changes of db config add .env file and rename of ex_formate.html to file_formate.html

run.py

@@ -1,9 +1,17 @@
-from app import create_app, db
+from dotenv import load_dotenv
+load_dotenv()
+from app import create_app
+from app.services.db_service import db
+import os
 
 app = create_app()
 
-with app.app_context():
-    db.create_all()
-
 if __name__ == "__main__":
-    app.run(host='0.0.0.0' ,debug=True, port=5001)
+    with app.app_context():
+        db.create_all() 
+
+    app.run(
+        host=os.getenv("FLASK_HOST"),
+        port=int(os.getenv("FLASK_PORT")),
+        debug=os.getenv("FLASK_DEBUG") == "True"
+    )