Merge pull request #6222 from RocketChat/geekgonecrazy-patch-1

Remove oplog requirement for now

.docker/latest/Dockerfile

@@ -25,7 +25,6 @@ WORKDIR /app/bundle
 
 # needs a mongoinstance - defaults to container linking with alias 'mongo'
 ENV MONGO_URL=mongodb://mongo:27017/rocketchat \
-    MONGO_OPLOG_URL=mongodb://mongo:27017/local \
     HOME=/tmp \
     PORT=3000 \
     ROOT_URL=http://localhost:3000 \