update dockerfile

Dockerfile

@@ -2,11 +2,12 @@
 ARG NODE_VERSION=20.10.0
 ARG NPM_VERSION=10.2.5
 
-# --------------> The build image
-FROM node:$NODE_VERSION AS build
+# --------------> The builder image
+FROM node:$NODE_VERSION AS builder
+ENV NODE_ENV production
+WORKDIR /usr/src/app
 RUN apt-get update && apt-get install -y --no-install-recommends dumb-init
 ARG NPM_TOKEN
-WORKDIR /usr/src/app
 COPY package*.json /usr/src/app/
 RUN echo "//registry.npmjs.org/:_authToken=$NPM_TOKEN" > .npmrc && \
    npm install -g npm@$NPM_VERSION && \
@@ -14,11 +15,11 @@ RUN echo "//registry.npmjs.org/:_authToken=$NPM_TOKEN" > .npmrc && \
    rm -f .npmrc
  
 # --------------> The production image
-FROM node:$NODE_VERSION-slim
+FROM node:$NODE_VERSION-slim AS production
 ENV NODE_ENV production
-COPY --from=build /usr/bin/dumb-init /usr/bin/dumb-init
-USER node
 WORKDIR /usr/src/app
-COPY --chown=node:node --from=build /usr/src/app/node_modules /usr/src/app/node_modules
+COPY --from=builder /usr/bin/dumb-init /usr/bin/dumb-init
+COPY --chown=node:node --from=builder /usr/src/app/node_modules /usr/src/app/node_modules
 COPY --chown=node:node . /usr/src/app
+USER node
 CMD ["dumb-init", "node", "index.js"]