Fixing pusher build + building in CI

pusher/Dockerfile

@@ -1,15 +1,9 @@
-FROM thecodingmachine/workadventure-back-base:latest as builder
-WORKDIR /var/www/messages
-COPY --chown=docker:docker messages .
-RUN yarn install && yarn proto
-
 FROM thecodingmachine/nodejs:12
 
-COPY --chown=docker:docker back .
-COPY --from=builder --chown=docker:docker /var/www/messages/generated /usr/src/app/src/Messages/generated
+COPY --chown=docker:docker pusher .
 RUN yarn install
 
 ENV NODE_ENV=production
+RUN yarn run tsc
 
-CMD ["yarn", "run", "prod"]
-
+CMD ["yarn", "run", "runprod"]