update: backend Dockerfile

Dockerfile

@@ -1,5 +1,23 @@
-FROM node:8.11.1-alpine
+# BUILDING 
+FROM node:lts-alpine AS builder
 
+LABEL maintainer="llitfkitfk@gmail.com"
+
+RUN npm install -g typescript
+
+WORKDIR /app
+# cache dependencies
+COPY package.json ./
+RUN npm install
+
+# build
+COPY . ./
+RUN npm run build
+
+# RUNNING
+FROM node:lts-alpine
+
+LABEL maintainer="llitfkitfk@gmail.com"
 WORKDIR /app
-ADD . /tmp
-RUN /bin/sh -c 'cd /tmp && npm install && npm install -g typescript && npm run build && mv ./dist/* /app/ && mv ./node_modules /app/ && rm -rf /tmp'
+COPY --from=builder /app/dist/* ./
+COPY --from=builder /app/node_modules ./node_modules