fix: hardcode Traefik port labels (Gotcha 6 - vars not expanded in labels)

Coolify does not expand ${VAR} in label values. All loadbalancer port
labels must use hardcoded values:
- trilium:   ${TRILIUM_HTTP_PORT}  → 8080
- adguard:   ${ADGUARD_HTTP_PORT}  → 80
- authentik: ${AUTHENTIK_HTTP_PORT} → 9000
- gitea:     ${GITEA_HTTP_PORT}    → 3000
- wireguard: ${WG_UI_PORT}         → 51821

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

gitea/docker-compose.yml

@@ -69,7 +69,7 @@ services:
     ports:
       - "${GITEA_SSH_PORT}:${GITEA_SSH_PORT}"
     labels:
-      traefik.http.services.gitea.loadbalancer.server.port: "${GITEA_HTTP_PORT}"
+      traefik.http.services.gitea.loadbalancer.server.port: "3000"
 
   gitea-runner:
     image: ${GITEA_RUNNER_IMAGE}