Run as non-priviledged user in the docker image

Dockerfile

@@ -1,6 +1,12 @@
 FROM node:14-alpine
 
+
 WORKDIR /opt/app
+
+RUN chown -R 1000:1000 /opt/app
+
+USER 1000:1000
+
 COPY package.json package-lock.json ./
 RUN npm ci --production
 COPY . .