Dockerfile

@@ -2,7 +2,7 @@ FROM python:slim
 
 RUN pip install flask
 COPY /beer/beer.py /beer.py
-COPY /beer/static /static
+COPY /beer/templates /templates
 COPY /beer/static /static
 EXPOSE 5000
 

beer/beer.py

@@ -28,9 +28,18 @@ def index(hours=None, minutes=None):
 
 @app.route('/favicon.ico')
 def favicon():
-    """ serve the favicon """
+    """ serve default favicon """
     return send_from_directory('static', 'clock-icon.png')
 
+@app.route('/favicon/<mode>')
+def favicon():
+    """ serve the favicon according to the timer """
+    if mode == 'beer':
+        return send_from_directory('static', 'beer-icon.png')
+    else:
+        return send_from_directory('static', 'clock-icon.png')
+
+
 def main():
     """ main func """
     app.run(host='::')

beer/templates/beer.html

@@ -85,7 +85,7 @@ var x = setInterval(function() {
   if (distance < 0) {
     clearInterval(x);
 	  document.getElementById("demo").innerHTML = "<blink>BEER TIME !</blink>";
-	  changeFavicon('beer-icon.png')
+	  changeFavicon('/favicon/beer')
   }
 }, 1000);
 </script>