Fix permission issue on npm install

This alpine version is overriding the custom user:
- nodejs/docker-node#740
- https://stackoverflow.com/questions/44766665/how-do-i-docker-copy-as-non-root?answertab=votes#tab-top

client/Dockerfile

@@ -3,10 +3,10 @@ FROM node:16.15.0-alpine3.15
 RUN addgroup app && adduser -S -G app app
 USER app
 
-WORKDIR /app
-COPY package*.json ./
-RUN npm install
-COPY . .
+WORKDIR /app 
+COPY --chown=app:node package*.json ./ 
+RUN npm install 
+COPY --chown=app:node . .
 
 EXPOSE 3000