fix port number

Dockerfile

@@ -65,7 +65,7 @@ RUN yarn run build
 # which runs Nginx using Alpine Linux
 FROM nginxinc/nginx-unprivileged:1.25-alpine as final
 #RUN apk add --no-cache bash
-ENV PORT=80
+ENV PORT=8080
 RUN rm /etc/nginx/conf.d/default.conf
 USER nginx
 COPY --chown=nginx:nginx .docker/Viewer-v3.x /usr/src