added simple navigation to switch from images to map view;

added simple images view skeleton;
remove unnecessary websocket support;

middleware/app_be/views/ws_api.py

@@ -1,18 +0,0 @@
-import logging
-
-from channels.generic.websocket import WebsocketConsumer
-
-
-logger = logging.getLogger(__name__)
-
-
-class CustomConsumer(WebsocketConsumer):
-    def connect(self):
-        self.accept()
-
-    def receive(self, text_data=None, bytes_data=None):
-        self.send('1. response: {}'.format(text_data))
-        self.send('2. response: {}'.format(text_data))
-
-    def disconnect(self, code):
-        pass