created a dockerfile for the client/frontend

.gitlab-ci.yml

@@ -35,3 +35,7 @@ test_server:
     - npm install
     - npm run test
 
+build_client:
+  stage: build
+  script:
+    - docker build -f app/client/Dockerfile -t client:v0.0.1 client

app/client/Dockerfile

+# Build a release
+FROM node:12.16.3 as build
+
+RUN mkdir /usr/src/app
+
+WORKDIR /usr/src/app
+ENV PATH /usr/src/app/node_modules/.bin:$PATH
+
+COPY package.json /usr/src/app/package.json
+
+RUN npm install
+
+COPY . /usr/src/app
+
+RUN npm run build
+
+# Put this stuff into a nginx server
+FROM nginx:latest
+# copy from previous build to this image
+COPY --from=build /usr/src/app/build /usr/share/nginx/html
+
+EXPOSE 80
+
+CMD ["nginx", "-g", "daemon off;"]