add favicon

app.py

@@ -1,8 +1,9 @@
-from flask import Flask, render_template, jsonify
+from flask import Flask, render_template, jsonify, send_from_directory
 import meshtastic.serial_interface
 import meshtastic
 import threading
 import time
+import os
 
 
 app = Flask(__name__)
@@ -45,5 +46,11 @@ def nodes():
         "nodes": data
     })
 
+# Serve favicon
+@app.route('/favicon.ico')
+def favicon():
+    return send_from_directory(os.path.join(app.root_path, 'static'),
+                               'favicon.ico', mimetype='image/vnd.microsoft.icon')
+
 if __name__ == "__main__":
     app.run(host='0.0.0.0', port=8083)