chore: set restart: unless-stopped on every service

Coolify injects the same value when a compose service omits one, but Dokploy
runs the file as written, so in its default compose mode an omitted policy
leaves the container down after a crash or a host reboot.

gitea-mirror/compose.yml

@@ -1,6 +1,7 @@
 services:
   db:
     image: postgres:16-alpine
+    restart: unless-stopped
     environment:
       POSTGRES_DB: gitea
       POSTGRES_USER: gitea
@@ -15,6 +16,7 @@ services:
 
   gitea:
     image: gitea/gitea:latest
+    restart: unless-stopped
     depends_on:
       db:
         condition: service_healthy
@@ -33,6 +35,7 @@ services:
 
   gitea-mirror:
     image: ghcr.io/raylabshq/gitea-mirror:latest
+    restart: unless-stopped
     pull_policy: always
     volumes:
       - gitea-mirror-data:/app/data