I post my Seafile docker-compose and seafile.nginx.conf in my first post. That seafile.nginx.conf I find in dietpi@DietPi:~/seafile-server/data/app/nginx/conf/seafile.nginx.conf. I never use any nginx conf file. I use Nginx Proxy Manager and add apps as subfolders. Then just set in apps base url and that just works.
I use DietpiOS (debian 11) on HP intel miniPC, kernel 5.10 x86_64.
I don’t know how to ping that Nginx Proxy Manager because I don’t see any IP with docker ps or in Pointainer
dietpi@DietPi:~/seafile-server/data/app/nginx/conf$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
93142aabc162 mariadb:latest "docker-entrypoint.s…" 2 hours ago Up 2 hours 3306/tcp seafile-mysql
8bf08ecc0ffb seafileltd/seafile-mc "/sbin/my_init -- /s…" 16 hours ago Up 16 hours 0.0.0.0:8090->80/tcp, :::8090->80/tcp seafile
1b58e86d9298 memcached "memcached -m 256" 16 hours ago Up 16 hours 11211/tcp seafile-memcached
fbb37b6c6c1a koenkk/zigbee2mqtt:latest "docker-entrypoint.s…" 2 days ago Up 2 days 0.0.0.0:8081->8080/tcp, 0.0.0.0:9999->8080/tcp, :::8081->8080/tcp, :::9999->8080/tcp zigbee2mqtt
0022ef2e1e7b lscr.io/linuxserver/wireguard "/init" 3 days ago Up 2 days 0.0.0.0:51820->51820/udp, :::51820->51820/udp wireguard
62569b171261 jlesage/nginx-proxy-manager:latest "/init" 9 days ago Up 2 days npm_nginx-proxy-manager_1
145c06ce4b4f eclipse-mosquitto:2.0 "/docker-entrypoint.…" 3 weeks ago Up 2 days 0.0.0.0:1883->1883/tcp, :::1883->1883/tcp, 0.0.0.0:9001->9001/tcp, :::9001->9001/tcp dietpi_mqtt_1
d6bb53ee93e7 portainer/portainer-ce "/portainer -H unix:…" 3 weeks ago Up 2 days 8000/tcp, 9443/tcp, 0.0.0.0:9000->9000/tcp, :::9000->9000/tcp portainer
2492862a0f7d hrfee/jfa-go "/opt/jfa-go/jfa-go …" 4 weeks ago Up 2 days 0.0.0.0:8056->8056/tcp, :::8056->8056/tcp, 8057/tcp jfago
ec78fe2025e1 containrrr/watchtower "/watchtower" 4 weeks ago Up 2 days 8080/tcp watchtower
dietpi@DietPi:~/seafile-server/data/app/nginx/conf$
Regards