Using multistage builds with protocol buffers

back/Dockerfile

@@ -1,9 +1,13 @@
+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 --chown=docker:docker messages ../messages
+COPY --from=builder --chown=docker:docker /var/www/messages /var/www/messages
 RUN yarn install
-RUN cd /usr/src/messages && yarn install && yarn proto
 
 ENV NODE_ENV=production
 

front/Dockerfile

@@ -1,10 +1,14 @@
+FROM thecodingmachine/workadventure-back-base:latest as builder
+WORKDIR /var/www/messages
+COPY --chown=docker:docker messages .
+RUN yarn install && yarn proto
+
 # we are rebuilding on each deploy to cope with the API_URL environment URL
 FROM thecodingmachine/nodejs:14-apache
 
 COPY --chown=docker:docker front .
-COPY --chown=docker:docker messages /var/www/messages
+COPY --from=builder --chown=docker:docker /var/www/messages /var/www/messages
 RUN yarn install
-RUN cd /var/www/messages && yarn install && yarn proto
 
 ENV NODE_ENV=production
 ENV STARTUP_COMMAND_1="yarn run build"