Made the docker image execute rootless

Author: Flowkap

Dockerfile

@@ -17,4 +17,6 @@ WORKDIR /usr/src/app
 # COPY --from=deps /app/node_modules/ ./node_modules/
 COPY --from=build /app/package.json .
 COPY --from=build /app/build/ ./
+RUN chown -R node:node ./
+USER node
 ENTRYPOINT [ "node", "app.js" ]

README.md

@@ -122,6 +122,7 @@ Defined in [launch.json](./.vscode/launch.json)
 
 ### Docker
 Defined in [Dockerfile](./Dockerfile)
+The image is built to run rootless. Refer to: https://github.com/nodejs/docker-node/blob/master/docs/BestPractices.md#non-root-user.
 
 ```
 npm i