Update frontend to use unprivileged Nginx on port 8080

Switch from `nginx:1.29-alpine-slim` to `nginxinc/nginx-unprivileged:stable-alpine` for improved security by running as a non-root user. Changed the exposed port from 80 to 8080 in the configurations to reflect the unprivileged setup. Adjusted the `docker-compose.yml` and `nginx.conf` accordingly.

docker-compose.yml

@@ -54,7 +54,7 @@ services:
     depends_on:
       - backend
     ports:
-      - "${FRONTEND_PORT}:80"
+      - "${FRONTEND_PORT}:8080"
 
 volumes:
   pg_data:

frontend/Dockerfile

@@ -7,9 +7,9 @@ ARG VITE_API_URL=/api/v1
 ENV VITE_API_URL=${VITE_API_URL}
 RUN npm run build
 
-FROM nginx:1.29-alpine-slim
-RUN apk upgrade --no-cache
+FROM nginxinc/nginx-unprivileged:stable-alpine
 COPY nginx.conf /etc/nginx/conf.d/default.conf
 COPY --from=build /app/dist /usr/share/nginx/html
-EXPOSE 80
+USER 101
+EXPOSE 8080
 HEALTHCHECK --interval=30s --timeout=3s --retries=5 CMD nginx -t || exit 1

frontend/nginx.conf

@@ -1,5 +1,5 @@
 server {
-  listen 80;
+  listen 8080;
   server_name _;
 
   root /usr/share/nginx/html;