Update app.py

app.py

@@ -22,7 +22,7 @@ app.secret_key = os.environ.get("SESSION_SECRET", os.urandom(24).hex())
 
 # ------------------ Database ------------------
 
-app.config["SQLALCHEMY_DATABASE_URI"] = os.environ.get("DATABASE_URL", "sqlite:///inkboard.db")
+app.config["SQLALCHEMY_DATABASE_URI"] = os.environ.get("DATABASE_URL", "sqlite:////tmp/inkboard.db")
 app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
 app.config["SQLALCHEMY_ENGINE_OPTIONS"] = {
     'pool_pre_ping': True,