fix(wordpress): route loopback requests through Traefik to fix cURL error 28

WordPress resolves its own public domain to the server's public IP from
inside the container, so REST API / WP-Cron / Site Health loopback
requests depend on hairpin NAT, which times out (cURL error 28) on many
hosts. Pin the site domain to the dokploy-traefik container IP in
/etc/hosts at startup (with retries, since Traefik joins the compose
network shortly after the container starts) so loopback traffic stays
inside the Docker network for both HTTP and HTTPS. No-op fallback when
dokploy-traefik is not resolvable.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

blueprints/wordpress/docker-compose.yml

@@ -1,6 +1,27 @@
 services:
   wordpress:
     image: wordpress:latest
+    # Resolve the site's own domain to the Traefik container instead of the
+    # server's public IP. Loopback requests (REST API, WP-Cron, Site Health)
+    # otherwise depend on hairpin NAT, which times out on many hosts
+    # (cURL error 28). See https://github.com/Dokploy/templates/issues/128
+    command:
+      - bash
+      - -c
+      - |
+        if [ -n "$$WP_DOMAIN" ]; then
+          (
+            for i in $$(seq 1 60); do
+              TRAEFIK_IP="$$(getent hosts dokploy-traefik | awk '{print $$1; exit}')"
+              if [ -n "$$TRAEFIK_IP" ]; then
+                grep -q "[[:space:]]$$WP_DOMAIN\$$" /etc/hosts || echo "$$TRAEFIK_IP $$WP_DOMAIN" >> /etc/hosts
+                break
+              fi
+              sleep 2
+            done
+          ) &
+        fi
+        exec docker-entrypoint.sh apache2-foreground
     volumes:
       - wp_app:/var/www/html
       - ../files/uploads.ini:/usr/local/etc/php/conf.d/uploads.ini
@@ -10,6 +31,7 @@ services:
       WORDPRESS_DB_USER: root
       WORDPRESS_DB_PASSWORD: $DB_PASSWORD
       WORDPRESS_DEBUG: ${WORDPRESS_DEBUG:-0}
+      WP_DOMAIN: ${WP_DOMAIN}
       WORDPRESS_CONFIG_EXTRA: |
         define('WP_MEMORY_LIMIT', '256M');
         define('DISALLOW_FILE_EDIT', true);

blueprints/wordpress/template.toml

@@ -9,7 +9,8 @@ env = [
   "WORDPRESS_DEBUG=0",
   "DB_NAME=${db_name}",
   "DB_USER=${db_user}",
-  "DB_PASSWORD=${db_password}"
+  "DB_PASSWORD=${db_password}",
+  "WP_DOMAIN=${main_domain}"
 ]
 
 [[config.domains]]