Add max-old-space-size flag to imporve build time

Dockerfile

@@ -5,7 +5,7 @@ COPY package.json package-lock.json ./
 RUN npm i && mkdir /app && mv ./node_modules ./app
 WORKDIR /app
 COPY . .
-RUN ./node_modules/@angular/cli/bin/ng build --prod
+RUN node --max-old-space-size=4096 ./node_modules/@angular/cli/bin/ng build --prod
 
 # Step 2: Use build output from 'builder'