Refactor VPN proxy client implementation

Dockerfile

@@ -1,9 +1,21 @@
+ARG NODE_BUILD_IMAGE=node:20.19-alpine
 ARG BASE_IMAGE=debian:bookworm-slim
+
+FROM ${NODE_BUILD_IMAGE} AS build
+WORKDIR /src
+COPY package.json package-lock.json ./
+RUN npm ci
+COPY index.html vite.config.ts tsconfig*.json ./
+COPY src/web ./src/web
+COPY src/server ./src/server
+COPY src/shared ./src/shared
+COPY monitoring/grafana/harbor-gateway.json ./monitoring/grafana/harbor-gateway.json
+RUN npm run build:production
+
 FROM ${BASE_IMAGE}
 ARG SINGBOX_VERSION=1.12.13
 ARG INSTALL_RUNTIME_DEPS=true
 ARG INSTALL_SINGBOX=true
-COPY dist /app/dist
 
 RUN if [ "${INSTALL_RUNTIME_DEPS}" = "true" ]; then \
         apt-get update \
@@ -33,9 +45,8 @@ RUN if [ "${INSTALL_SINGBOX}" = "true" ]; then \
     fi
 
 WORKDIR /app
+COPY --from=build /src/dist /app/dist
 COPY package.json /app/package.json
-COPY src/server /app/src/server
-COPY src/shared /app/src/shared
 COPY entrypoint.sh /entrypoint.sh
 
 RUN chmod +x /entrypoint.sh \