*: Dockerfiles cleanup, docker-compose.prod.yaml

New docker-compose.prod.yaml should provide a production-ish deployment
of WorkAdventure

pusher/Dockerfile

@@ -1,15 +1,26 @@
-FROM thecodingmachine/workadventure-back-base:latest as builder
-WORKDIR /var/www/messages
-COPY --chown=docker:docker messages .
+# protobuf build
+FROM node:14.15.4-buster-slim@sha256:cbae886186467bbfd274b82a234a1cdfbbd31201c2a6ee63a6893eefcf3c6e76 as builder
+WORKDIR /usr/src
+COPY messages .
 RUN yarn install && yarn proto
 
-FROM thecodingmachine/nodejs:12
-
-COPY --chown=docker:docker pusher .
-COPY --from=builder --chown=docker:docker /var/www/messages/generated /usr/src/app/src/Messages/generated
+# typescript build
+FROM node:14.15.4-buster-slim@sha256:cbae886186467bbfd274b82a234a1cdfbbd31201c2a6ee63a6893eefcf3c6e76 as builder2
+WORKDIR /usr/src
+COPY pusher/yarn.lock pusher/package.json ./
 RUN yarn install
-
+COPY pusher .
+COPY --from=builder /usr/src/generated src/Messages/generated
 ENV NODE_ENV=production
 RUN yarn run tsc
 
+# final production image
+FROM node:14.15.4-buster-slim@sha256:cbae886186467bbfd274b82a234a1cdfbbd31201c2a6ee63a6893eefcf3c6e76
+WORKDIR /usr/src
+COPY pusher/yarn.lock pusher/package.json ./
+COPY --from=builder2 /usr/src/dist /usr/src/dist
+ENV NODE_ENV=production
+RUN yarn install --production
+
+USER node
 CMD ["yarn", "run", "runprod"]

pusher/Dockerfile.prod

@@ -0,0 +1,17 @@
+FROM node:12.19.0-slim
+
+RUN mkdir -p /home/node/app && chown -R node:node /home/node/app
+WORKDIR /home/node/app
+
+USER node
+ENV NODE_ENV=production
+ENV DEBUG=*
+
+COPY --chown=node:node package.json yarn.lock ./
+
+RUN yarn install --prod --frozen-lockfile
+
+COPY --chown=node:node ./dist/ ./dist/
+
+EXPOSE 8080
+CMD ["yarn", "run", "runprod"]