update dockerfile

Dockerfile

-FROM node:bullseye-slim
+FROM node:bullseye-slim as base
 LABEL Author="Nanahira <nanahira@momobako.com>"
 
 RUN apt update && apt -y install python3 build-essential && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 WORKDIR /usr/src/app
 COPY ./package*.json ./
-RUN npm ci
+
+FROM base as builder
+RUN npm ci && npm cache clean --force
 COPY . ./
 RUN npm run build
 
-CMD ["npm", "run", "start:prod"]
+FROM base
+ENV NODE_ENV production
+RUN npm ci && npm cache clean --force
+COPY --from=builder /usr/src/app/dist ./dist
+
+EXPOSE 3000
+CMD [ "npm", "run", "start:prod" ]