add PWA & makeup

app.py

@@ -1,4 +1,4 @@
-from flask import Flask, render_template, request, session, jsonify
+from flask import Flask, render_template, request, session, jsonify, send_from_directory
 from paho.mqtt import client as mqtt_client
 from werkzeug.security import generate_password_hash, check_password_hash
 import json
@@ -569,6 +569,18 @@ def save_config_file():
     conn.close()
     return jsonify({"success": True})
 
+@app.route('/manifest.json')
+def serve_manifest():
+    return send_from_directory('.', 'manifest.json')
+
+@app.route('/sw.js')
+def serve_sw():
+    return send_from_directory('.', 'sw.js')
+
+@app.route('/icon-512.png')
+def serve_icon():
+    return send_from_directory('.', 'icon-512.png')
+
 if __name__ == '__main__':
     threading.Thread(target=auto_update_ids, daemon=True).start()
     app.run(host='0.0.0.0', port=5000)