compose: MediaMTX -ffmpeg image, loopback HLS/WebRTC/API ports, 8189, hook env (earlier edit never applied)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

docker-compose.yml

@@ -1,11 +1,19 @@
 services:
   mediamtx:
-    image: bluenviron/mediamtx:latest
+    image: bluenviron/mediamtx:latest-ffmpeg     # alpine variant: has sh + wget for the is-live Discord hook
     container_name: mediamtx
     user: "1000:1000"             # recordings owned by the debian user, so the archive pull can delete them
+    environment:
+      LIVE_WEBHOOK_URL: ${LIVE_WEBHOOK_URL:-}
+      LIVE_HOST: ${LIVE_HOST:-live.example.com}
     ports:
-      - "1935:1935"          # RTMP ingest
-      - "8890:8890/udp"      # SRT ingest
+      - "1935:1935"              # RTMP ingest
+      - "8890:8890/udp"          # SRT ingest
+      - "8189:8189/udp"          # WebRTC media (viewers + Go Live)
+      - "8189:8189/tcp"          # WebRTC ICE-TCP fallback
+      - "127.0.0.1:8888:8888"    # HLS      -> Caddy live.HOST/hls/*
+      - "127.0.0.1:8889:8889"    # WebRTC   -> Caddy live.HOST/webrtc/*
+      - "127.0.0.1:9997:9997"    # API      -> Caddy live.HOST/api/*
     volumes:
       - ./mediamtx.yml:/mediamtx.yml:ro
       - /srv/media/streams:/recordings