Update Dockerfile.custom

Dockerfile.custom

@@ -1,14 +1,17 @@
-FROM --platform=$BUILDPLATFORM node:current AS build
+FROM --platform=$BUILDPLATFORM node:21 AS build
 
-WORKDIR /src
-COPY . .
+WORKDIR /app
 
-RUN yarn --network-timeout 1000000
-RUN yarn build
+COPY package.json yarn.lock .yarnrc.yml .
+COPY .yarn .yarn
+COPY packages packages
+COPY .git .git
+
+RUN yarn --network-timeout 1000000 && yarn build
 
 FROM nginxinc/nginx-unprivileged:mainline-alpine
 
 COPY docker/nginx.conf.custom /etc/nginx/conf.d/default.conf
-COPY --from=build /src/packages/app/build /usr/share/nginx/html
+COPY --from=build /app/packages/app/build /usr/share/nginx/html
 
 EXPOSE 8080