trying to fix docker build

.gitlab-ci.yml

@@ -54,7 +54,7 @@ build_client:
     - docker:19.03.12-dind
   stage: build
   script:
-    - docker build --network host -f app/client/Dockerfile -t $CLIENT_IMAGE_TAG .
+    - docker build -f app/client/Dockerfile -t $CLIENT_IMAGE_TAG .
     - docker tag $CLIENT_IMAGE_TAG $CLIENT_RELEASE_IMAGE_TAG
     - docker push $CLIENT_RELEASE_IMAGE_TAG
   only: 

app/client/Dockerfile

 # Build a release
-FROM node:12.16.3
+FROM node:12.16.3 as build
 
 RUN mkdir /usr/src/app
+RUN ls
 WORKDIR /usr/src/app
+RUN ls
 COPY package*.json ./
 ENV PATH /usr/src/app/node_modules/.bin:$PATH
 
@@ -15,7 +17,7 @@ RUN npm run build
 # Put this stuff into a nginx server
 FROM nginx:latest
 
-COPY --from=0 /usr/src/app/build /usr/share/nginx/html
+COPY --from=build /usr/src/app/build /usr/share/nginx/html
 
 EXPOSE 80