Implement shared Caddy setup with initializing and unavailable pages for various apps

- Refactor domain scripts for Ghost, Gitea, Jellyfin, Metabase, n8n, NocoDB, Open WebUI, OpenClaw, PicoClaw, Plausible, Signoz, Uptime Kuma, and Vaultwarden to utilize a common Caddy setup script.
- Introduce `caddy-setup.sh` for managing Caddy configurations and handling app initialization states.
- Create `initializing.html` and `unavailable.html` pages to provide user feedback during app deployment and downtime.
- Update domain handling logic to ensure seamless transitions between initializing and operational states.
- Enhance user experience by providing visual indicators for app status during setup and maintenance.

jellyfin/domain.sh

@@ -12,17 +12,14 @@ if [ -z "${DOMAIN}" ]; then
   exit 1
 fi
 
-URL="https://${DOMAIN}"
 COMPOSE_FILE="${APP_DIR}/${APP_NAME}/docker-compose.yml"
 
-cat > /etc/caddy/Caddyfile <<EOF
-${URL} {
-        reverse_proxy 127.0.0.1:${APP_UPSTREAM_PORT}
-}
-EOF
+source /var/excloud/scripts/caddy-setup.sh
 
-echo "Caddyfile updated"
-
-systemctl enable caddy
-docker compose -f "${COMPOSE_FILE}" up -d --remove-orphans
-systemctl reload caddy
+if is_app_ready "$APP_DIR/$APP_NAME"; then
+    switch_domain "$DOMAIN" "$APP_UPSTREAM_PORT" "$APP_DIR/$APP_NAME"
+else
+    setup_initializing_page "$DOMAIN" "$APP_NAME" "$APP_DIR/$APP_NAME"
+    docker compose -f "${COMPOSE_FILE}" up -d --remove-orphans
+    wait_and_switch_to_proxy "$DOMAIN" "$APP_UPSTREAM_PORT" "$APP_DIR/$APP_NAME" &
+fi