build: add multi stage Dockerfile (#2)

Author: vandot

Dockerfile

@@ -1,16 +1,24 @@
-FROM node:alpine
+FROM node:alpine as base
 
 WORKDIR /usr/src/app
 
-COPY package*.json .
-COPY dist dist
+COPY . .
 
-RUN npm install --ignore-scripts
+RUN npm ci
 
-EXPOSE 9000
+RUN npm run build
+
+FROM node:alpine
+
+WORKDIR /usr/src/app
 
 ENV PORT=""
 ENV TARGET=""
 ENV EXPIRY=""
 
+COPY --from=base --chown=nobody:nogroup /usr/src/app/dist dist
+COPY --from=base --chown=nobody:nogroup /usr/src/app/node_modules node_modules
+USER nobody
+EXPOSE 9000
+
 CMD sh -c "node dist/index.js --port $PORT --target $TARGET --expiry $EXPIRY"