dockerfile updated

Dockerfile

@@ -15,13 +15,11 @@ RUN npm install
 
 COPY . ./
 
-FROM builder as prod-builder
 RUN npm run build
 
-# it's a good idea to pin this, but for demo purposes we'll leave it as is
 FROM nginx:latest as prod
 
-COPY --from=prod-builder /usr/src/app/dist /usr/share/nginx/html
+COPY --from=builder /usr/src/app/dist /usr/share/nginx/html
 ADD default.conf /etc/nginx/conf.d/default.conf
 
 CMD ["nginx", "-g", "daemon off;"]