Drill 18: Improve it — .dockerignore and build speed

FROM node:22-alpine AS build
WORKDIR /app
COPY package*.json ./
RUN npm ci
COPY . .
RUN npm run build

FROM node:22-alpine
WORKDIR /app
ENV NODE_ENV=production
COPY --from=build /app/dist ./dist
USER node
EXPOSE 3000
CMD ["node", "dist/index.js"]