chore: Update deployment configuration and documentation

- Update Gitea configuration (remove DEFAULT_ACTIONS_URL)
- Fix deployment documentation
- Update Ansible playbooks
- Clean up deprecated files
- Add new deployment scripts and templates

deployment/stacks/gitea/README.md

@@ -119,6 +119,21 @@ docker compose ps
    git clone ssh://git@git.michaelschiemer.de:2222/username/repo.git
    ```
 
+### Configuration File
+
+Gitea configuration is managed via `app.ini` file:
+- **Local file**: `deployment/stacks/gitea/app.ini` (for local development)
+- **Production**: Generated from Ansible template `deployment/ansible/templates/gitea-app.ini.j2`
+- The `app.ini` is mounted read-only into the container at `/data/gitea/conf/app.ini`
+- Configuration is based on the official Gitea example: https://github.com/go-gitea/gitea/blob/main/custom/conf/app.example.ini
+
+**Key Configuration Sections:**
+- `[server]`: Domain, ports, SSH settings
+- `[database]`: PostgreSQL connection
+- `[actions]`: Actions enabled, no GitHub dependency
+- `[service]`: Registration settings
+- `[cache]` / `[session]` / `[queue]`: Storage configuration
+
 ### Gitea Actions
 
 Gitea Actions (GitHub Actions compatible) are enabled by default. To use them: