etherpad: add plugins (enables closed captions)

docker-compose.yml

@@ -57,16 +57,12 @@ services:
       - "host.docker.internal:10.7.7.1"
 
   etherpad:
-    image: etherpad/etherpad:1.8.4
+    build: mod/etherpad
     restart: unless-stopped
     depends_on:
       - redis
     environment:
       ETHERPAD_API_KEY: ${ETHERPAD_API_KEY}
-    volumes:
-      - ./mod/pad/settings.json:/opt/etherpad-lite/settings.json
-      - ./mod/pad/entrypoint.sh:/entrypoint.sh
-    entrypoint: /entrypoint.sh
     networks:
       bbb-net:
         ipv4_address: 10.7.7.4

mod/etherpad/Dockerfile

@@ -0,0 +1,21 @@
+FROM etherpad/etherpad:1.8.4
+
+USER root
+
+# install etherpad plugins
+# - ep_delete_after_delay_lite
+# - ep_redis_publisher
+RUN apt-get update \
+    && apt-get install -y git \
+    && npm install ep_delete_after_delay_lite  git+https://git@github.com/pedrobmarin/ep_redis_publisher.git
+
+# apply "Including more data at pad update event"
+# https://github.com/mconf/etherpad-lite/commit/5bc37fc92714e82165386dc0a5dd467609169a87
+# this is a necessary patch for the closed captions
+RUN sed -i "s|hooks\.callAll(\"padUpdate\".*)|hooks\.callAll(\"padUpdate\", {'pad':this, 'author': author, 'revs': newRev, 'changeset': aChangeset});|" /opt/etherpad-lite/src/node/db/Pad.js
+
+COPY settings.json /opt/etherpad-lite/settings.json
+COPY entrypoint.sh /entrypoint.sh
+
+USER etherpad
+ENTRYPOINT ["/entrypoint.sh"]

mod/etherpad/entrypoint.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
 echo $ETHERPAD_API_KEY > /tmp/apikey
 export NODE_ENV=production
+
 node /opt/etherpad-lite/node_modules/ep_etherpad-lite/node/server.js --apikey /tmp/apikey