Add var replacement script to prod client dockerfile

Docker/prod/client.Dockerfile

@@ -13,5 +13,6 @@ RUN npm run build
 FROM nginx:1.27.1-alpine
 
 COPY --from=build /app/dist /usr/share/nginx/html
-
+COPY --from=build /app/env.sh /docker-entrypoint.d/env.sh
+RUN chmod +x /docker-entrypoint.d/env.sh
 CMD ["nginx", "-g", "daemon off;"]