Improve deployment security

Dockerfile

@@ -1,4 +1,4 @@
-FROM reg.dev.krd/hub.docker/library/node:16 as build-stage
+FROM node:16 as build-stage
 
 WORKDIR /app
 
@@ -13,8 +13,7 @@ COPY *.js ./
 
 RUN npm run build
 
-FROM reg.dev.krd/hub.docker/library/nginx:1.20-alpine AS production
+FROM bitnami/nginx:1.20 AS production
 
-COPY --from=build-stage /app/build /usr/share/nginx/html
-COPY nginx.conf /etc/nginx/conf.d/default.conf
-EXPOSE 80
+COPY --from=build-stage /app/build /app
+EXPOSE 8080