docker folder cleanup

.docker/dockerfiles/latest/Dockerfile

-FROM node:0.10
-
-# crafted and tuned by pierre@ozoux.net and sing.li@rocket.chat
-MAINTAINER buildmaster@rocket.chat
-
-RUN groupadd -r rocketchat \
-&&  useradd -r -g rocketchat rocketchat
-
-VOLUME /app/uploads
-
-# gpg: key 4FD08014: public key "Rocket.Chat Buildmaster <buildmaster@rocket.chat>" imported
-RUN gpg --keyserver ha.pool.sks-keyservers.net --recv-keys 0E163286C20D07B9787EBE9FD7F9D0414FD08104
-
-ENV RC_VERSION latest
-
-WORKDIR /app
-
-RUN curl -fSL "https://rocket.chat/releases/${RC_VERSION}/download" -o rocket.chat.tgz \
-&&  curl -fSL "https://rocket.chat/releases/${RC_VERSION}/asc" -o rocket.chat.tgz.asc \
-&&  gpg --verify rocket.chat.tgz.asc \
-&&  tar zxvf rocket.chat.tgz \
-&&  rm rocket.chat.tgz  \
-&&  cd bundle/programs/server \
-&&  npm install
-
-USER rocketchat
-
-WORKDIR /app/bundle
-
-# needs a mongoinstance - defaults to container linking with alias 'mongo'
-ENV MONGO_URL=mongodb://mongo:27017/rocketchat \
-    PORT=3000 \
-    ROOT_URL=http://localhost:3000 \
-    Accounts_AvatarStorePath=/app/uploads
-
-EXPOSE 3000
-
-CMD ["node", "main.js"]