cd: 백엔드 도커 이미지 경량화 (#201)

server/Dockerfile

@@ -1,17 +1,33 @@
-FROM node:22-alpine
+FROM node:22-alpine AS builder
 
 WORKDIR /app
 
-RUN apk add --no-cache ffmpeg
-
 COPY package.json yarn.lock .yarnrc.yml tsconfig.json ./
 COPY .yarn .yarn
-COPY server/ server/
+COPY server server
 
-RUN corepack enable && \
-    yarn install
+RUN corepack enable
+RUN yarn install
 
 WORKDIR /app/server
+RUN yarn install
+RUN yarn build
+
+FROM node:22-alpine
+
+WORKDIR /app
+
+RUN apk add --no-cache ffmpeg
+RUN corepack enable
+
+COPY --from=builder /app/server/package.json ./package.json
+COPY --from=builder /app/yarn.lock ./yarn.lock
+COPY --from=builder /app/.yarnrc.yml ./.yarnrc.yml
+COPY --from=builder /app/.yarn ./.yarn
+COPY --from=builder /app/server/dist ./dist
+COPY server/.env ./.env
+
+RUN yarn workspaces focus --production --all
 
 EXPOSE 3000
-CMD ["yarn", "start"]
+CMD ["node", "dist/main.js"]