🤖 cd: production build로 수정 및 serve 적용

Author: ohcuy

dockerfile

@@ -1,7 +1,9 @@
 FROM node:20.18.0
 WORKDIR /app
-COPY package.json .
-RUN npm install
+RUN apt update &&\
+    apt install xsel -y
 COPY . .
 EXPOSE 3000
-CMD ["npm", "start"]
+CMD npm install &&\
+    npm run build &&\
+    npx serve -s build