fix: add volumes for Caddy to enable certificate persistence on self-hosted (#22273)

* Update docker-compose.hobby.yml

* use named volume instead of volume mount

we don't want to mount /etc from user's computers as 1. it's usually owned by root, 2. not portable to macos/windows

use a named volume instead like we do with e.g. posthogres

---------

Co-authored-by: Frank Hamand <frank@posthog.com>

docker-compose.hobby.yml

@@ -109,6 +109,8 @@ services:
             - '443:443'
         volumes:
             - ./Caddyfile:/etc/caddy/Caddyfile
+            - caddy-data:/data
+            - caddy-config:/config            
         depends_on:
             - web
     objectstorage:
@@ -191,3 +193,5 @@ volumes:
     objectstorage:
     postgres-data:
     clickhouse-data:
+    caddy-data:
+    caddy-config: