moved docker-compose to a template file to control RC version easier

templates/docker-compose.yml.j2

@@ -0,0 +1,68 @@
+version: '3.7'
+
+services:
+  rocketchat:
+    image: rocket.chat:{{ rc_version }}
+    command: >
+      bash -c
+        "for (( ; ; )); do
+          node main.js &&
+          s=$$? && break || s=$$?;
+          echo \"Could not start Rocket.Chat. Waiting 5 secs...\";
+          sleep 5;
+        done; (exit $$s)"
+    restart: unless-stopped
+    volumes:
+      - ./uploads:/app/uploads
+    environment:
+      - PORT=3000
+      - ROOT_URL=http://localhost:3000
+      - MONGO_URL=mongodb://mongo:27017/rocketchat
+      - MONGO_OPLOG_URL=mongodb://mongo:27017/local
+      - MAIL_URL=smtp://smtp.email
+    depends_on:
+      - mongo
+    ports:
+      - 3000:3000
+    labels:
+      - "traefik.backend=rocketchat"
+      - "traefik.frontend.rule=Host: your.domain.tld"
+
+  mongo:
+    image: mongo:4.0
+    restart: unless-stopped
+    volumes:
+      - ./data/db:/data/db
+      - ./data/dump:/dump
+    command: >
+      bash -c
+        "while [ ! -f /data/db/WiredTiger ]; do
+          echo \"wiredTiger migration hasn't started yet. Waiting 30 secs...\";
+          sleep 30;
+        done;
+        docker-entrypoint.sh mongod --oplogSize 128 --replSet rs0 --storageEngine=wiredTiger;"
+    depends_on:
+      - migrator
+    labels:
+      - "traefik.enable=false"
+
+  migrator:
+    build: ./docker/
+    volumes:
+      - ./data/db:/data/db
+
+  mongo-init-replica:
+    image: mongo:4.0
+    command: >
+      bash -c
+        "for (( ; ; )); do
+          mongo mongo/rocketchat --eval \"
+            rs.initiate({
+              _id: 'rs0',
+              members: [ { _id: 0, host: 'localhost:27017' } ]})\" &&
+          s=$$? && break || s=$$?;
+          echo \"Could not reach MongoDB. Waiting 5 secs ...\";
+          sleep 5;
+        done; (exit $$s)"
+    depends_on:
+      - mongo