add env differentiation

app/__init__.py

@@ -1,4 +1,5 @@
 from flask import Flask
+from dotenv import load_dotenv
 import os
 
 def create_app():
@@ -8,9 +9,12 @@ def create_app():
         app.static_folder = os.path.join(os.path.dirname(__file__), "../data/static")
         app.debug = True
         app.config["DB_PATH"] = "data/db/db.dev.sqlite"
+        load_dotenv()
     else:
         app.config["DB_PATH"] = "data/db/db.prod.sqlite"
 
+    app.config["SECRET_KEY"] = os.getenv("FLASK_SECRET_KEY")
+
     os.makedirs(os.path.dirname(app.config["DB_PATH"]), exist_ok = True)
     with app.app_context():
         from .schema import create as create_tables