Update meshtastic docs and remove stale mqtt-proxy service

meshtastic/docker-compose.yaml

@@ -68,28 +68,6 @@ services:
     networks:
       - default
       - pangolin
-  mqtt-proxy:
-    image: ghcr.io/ln4cy/mqtt-proxy:master
-    container_name: meshmonitor-mqtt-proxy
-    restart: unless-stopped
-    environment:
-      - INTERFACE_TYPE=tcp
-      - TCP_NODE_HOST=meshmonitor
-      - TCP_NODE_PORT=4404
-      - LOG_LEVEL=INFO
-      - TCP_TIMEOUT=300
-      - CONFIG_WAIT_TIMEOUT=60
-      - HEALTH_CHECK_ACTIVITY_TIMEOUT=300
-    depends_on:
-      - meshmonitor
-    healthcheck:
-      test: ["CMD-SHELL", "test -f /tmp/healthy && find /tmp/healthy -mmin -1 | grep -q healthy"]
-      interval: 30s
-      timeout: 10s
-      retries: 3
-      start_period: 60s
-    networks:
-      - default
 networks:
   ix-databases_shared-databases:
     external: true