fix server related stuff

app.py

@@ -1,18 +1,17 @@
 from flask import Flask, send_from_directory
-import os
 
 app = Flask(__name__, static_folder='static', static_url_path='/static')
 
+
 @app.route('/')
 def index():
     return send_from_directory('static', 'index.html')
 
-# Serve static files
+
 @app.route('/<path:filename>')
 def static_files(filename):
     return send_from_directory('static', filename)
 
+
 if __name__ == '__main__':
-    import sys
-    port = int(sys.argv[1]) if len(sys.argv) > 1 else 5000
-    app.run(debug=True, host='0.0.0.0', port=port)
+    app.run(debug=True, host='0.0.0.0', port=5000)