build: docker multi stage build

Dockerfile

@@ -1,9 +1,26 @@
-FROM node:10
+FROM node:16-alpine as build
+
+RUN mkdir -p /tmp/app && chown -R node:node /tmp/app
+
+WORKDIR /tmp/app
+
+USER node
+
+COPY --chown=node:node package.json package-lock.json ./
+
+RUN npm ci
+
+COPY --chown=node:node . .
+
+RUN npm run build
+
+
+FROM node:10 as final
 
 RUN npm install -g serve
 
 RUN mkdir -p /data/www
 
-COPY dist/ /data/www/
+COPY --from=build /tmp/app/dist/ /data/www/
 
 CMD ["serve", "-s", "/data/www/", "-p", "80", "--no-etag"]