diff --git a/app/public/index.html b/app/public/index.html
index 4abf4a4..d8581b4 100644
--- a/app/public/index.html
+++ b/app/public/index.html
@@ -8,7 +8,7 @@
 <body>
   <video id="v" controls autoplay muted style="width:100%"></video>
   <script>
-    const wsUrl = `ws://194.36.208.86:9090` // TODO use custom domain name
+    const wsUrl = `${location.protocol === 'https:' ? 'wss' : 'ws'}://${location.host}/ws`;
     const player = mpegts.createPlayer(
       { type: 'mpegts', isLive: true, url: wsUrl },
       { liveBufferLatencyChasing: true, liveBufferLatencyMaxLatency: 1.5 }
diff --git a/docker-compose.yml b/docker-compose.yml
index 5966b35..f96b011 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -14,13 +14,13 @@ services:
     container_name: mqtt-worker
     depends_on:
       - mosquitto
-    ports:
-      # - "80:80"
-      - "9090:9090" # external WebSocket port for video streaming
+    expose:
+      - 80 
+      - 9090 
     environment:
       MQTT_URL: mqtt://mosquitto:1883
-      HTTP_PORT: "80"
-      WS_PORT: "9090"
+      HTTP_PORT: 80 # http port for video previewiong page
+      WS_PORT: 9090 # WebSocket port for video streaming
       CLOUD_INGEST_URL: ${CLOUD_INGEST_URL:-https://demo.backend.drill.greact.ru/ingest}
       CLOUD_INGEST_API_KEY: ${CLOUD_INGEST_API_KEY:-}
       DEMO_CLOUD_INGEST_URL: ${DEMO_CLOUD_INGEST_URL:-}
