Remove ingress support from Seerr and add back normal webui

- Set ingress: false and add webui URL in config.yaml
- Remove nginx from Dockerfile PACKAGES
- Remove nginx ingress init script, nginx config, and nginx service

Co-authored-by: alexbelgium <44178713+alexbelgium@users.noreply.github.com>

seerr/rootfs/etc/nginx/includes/server_params.conf

@@ -1,6 +0,0 @@
-root            /app/sonarr/bin/UI;
-server_name     $hostname;
-
-add_header X-Content-Type-Options nosniff;
-add_header X-XSS-Protection "1; mode=block";
-add_header X-Robots-Tag none;