Build gui-client in Docker

See #425, #556.

Makefile

@@ -31,7 +31,6 @@ build: build-java build-dev-images
 build-java: install-parent-pom build-controller build-storage build-analysis build-gui
 
 build-gui:
-	cd hobbit-gui/gui-client && sh -c 'test "$$TRAVIS" = "true" && npm ci; true' && sh -c 'test "$$TRAVIS" = "true" || npm install; true' && npm run build-prod
 	# see hobbit-gui/gui-serverbackend/Dockerfile
 
 build-controller:

hobbit-gui/gui-serverbackend/Dockerfile

@@ -1,11 +1,19 @@
+# https://nodejs.org/en/docs/guides/nodejs-docker-webapp
+FROM node:16 AS build-client
+WORKDIR /usr/src/hobbit-platform
+COPY hobbit-gui/gui-client/package*.json ./hobbit-gui/gui-client/
+RUN npm --prefix hobbit-gui/gui-client ci --omit=dev
+COPY hobbit-gui/gui-client ./hobbit-gui/gui-client
+RUN npm --prefix hobbit-gui/gui-client run build-prod
+
 FROM maven:3-eclipse-temurin-11 AS build
 WORKDIR /usr/src/hobbit-platform
 COPY parent-pom/pom.xml ./parent-pom/
 COPY hobbit-gui/gui-serverbackend/pom.xml ./hobbit-gui/gui-serverbackend/
 RUN mvn --file ./hobbit-gui/gui-serverbackend/ dependency:go-offline
 COPY hobbit-gui/gui-serverbackend/src ./hobbit-gui/gui-serverbackend/src
 RUN mvn --file ./hobbit-gui/gui-serverbackend/ test
-COPY hobbit-gui/gui-client/dist ./hobbit-gui/gui-client/dist
+COPY --from=build-client /usr/src/hobbit-platform/hobbit-gui/gui-client/dist ./hobbit-gui/gui-client/dist
 RUN mvn --file ./hobbit-gui/gui-serverbackend/ package
 
 FROM jetty:9.3-jre8