rework

things/rocketchat/docker-compose.yml

 version: '2.4'
 services:
   myrocketchat:
-    image: rocketchat/rocket.chat:4.1.2
+    image: rocketchat/rocket.chat:5.4.1
     command: >
       bash -c
         "for i in `seq 1 30`; do
@@ -14,32 +14,27 @@ services:
     volumes:
       - ./myrocketchat/uploads:/app/uploads
     environment:
-      - PORT=3000
-      - ROOT_URL=https://myrocketchat.momobako.com
-      - MONGO_URL=mongodb://myrocketchat-mongo:27017/rocketchat
-      - MONGO_OPLOG_URL=mongodb://myrocketchat-mongo:27017/local?replSet=rs0
+      PORT: 3000
+      ROOT_URL: https://myrocketchat.momobako.com
+      MONGO_URL: mongodb://root:myrootpassword@myrocketchat-mongo:27017/myrocketchat?replicaSet=rs0&directConnection=true&authSource=admin
+      MONGO_OPLOG_URL: mongodb://root:myrootpassword@myrocketchat-mongo:27017/local?replicaSet=rs0&directConnection=true&authSource=admin
     depends_on:
       - myrocketchat-mongo
 
   myrocketchat-mongo:
-    image: mongo:5
+    image: bitnami/mongodb:6.0.3
     restart: always
     volumes:
-     - ./myrocketchat/data/db:/data/db
-    command: mongod --oplogSize 128 --replSet rs0
-
-  myrocketchat-mongo-init-replica:
-    image: mongo:5
-    command: >
-      bash -c
-        "for i in `seq 1 30`; do
-          mongo myrocketchat-mongo/rocketchat --eval \"
-            rs.initiate({
-              _id: 'rs0',
-              members: [ { _id: 0, host: 'localhost:27017' } ]})\" &&
-          s=$$? && break || s=$$?;
-          echo \"Tried $$i times. Waiting 5 secs...\";
-          sleep 5;
-        done; (exit $$s)"
-    depends_on:
-      - myrocketchat-mongo
+     - ./myrocketchat/data/db:/bitnami/mongodb
+    environment:
+      MONGODB_REPLICA_SET_MODE: primary
+      MONGODB_REPLICA_SET_NAME: rs0
+      MONGODB_REPLICA_SET_KEY: mysetkey
+      MONGODB_PORT_NUMBER: 27017
+      MONGODB_INITIAL_PRIMARY_HOST: myrocketchat-mongo
+      MONGODB_INITIAL_PRIMARY_PORT_NUMBER: 27017
+      MONGODB_ADVERTISED_HOSTNAME: myrocketchat-mongo
+      MONGODB_ENABLE_JOURNAL: 'true'
+      MONGODB_ROOT_USER: root
+      MONGODB_ROOT_PASSWORD: myrootpassword
+      MONGODB_DATABASE: myrocketchat