feat: --install-docker + --install-docker-prometheus

- docker_install.v: génère docker-compose.yml, ntfy-bridge.yaml,
  dashboard.html, et prometheus.yml si --install-docker-prometheus
- main.v: nouveaux flags --install-docker <dir> et
  --install-docker-prometheus <dir>
- Stack Prometheus scrape /metrics sur ntfy-bridge:9090

main.v

@@ -20,6 +20,8 @@ fn main() {
 	install_svc := fp.bool('install-service', 0, false, 'Install as a system service (auto-detects OS)')
 	uninstall_svc := fp.bool('uninstall-service', 0, false, 'Uninstall the system service')
 	svc_status := fp.bool('service-status', 0, false, 'Check if the service is installed and running')
+	install_docker := fp.string('install-docker', 0, '', 'Generate docker-compose stack in <dir>')
+	install_docker_prom := fp.string('install-docker-prometheus', 0, '', 'Generate docker-compose + Prometheus stack in <dir>')
 
 	// Show help if no args or --help/-h requested
 	if os.args.len <= 1 || '--help' in os.args || '-h' in os.args {
@@ -38,6 +40,24 @@ fn main() {
 		return
 	}
 
+	if install_docker != '' {
+		install_docker_stack(install_docker, false) or {
+			eprintln('Error: ${err}')
+			exit(1)
+			return
+		}
+		return
+	}
+
+	if install_docker_prom != '' {
+		install_docker_stack(install_docker_prom, true) or {
+			eprintln('Error: ${err}')
+			exit(1)
+			return
+		}
+		return
+	}
+
 	if install_svc {
 		service_install(config_path, quiet) or {
 			eprintln('Error: ${err}')
@@ -144,9 +164,13 @@ fn print_help() {
 	println('  -h, --help             Show this help message')
 	println('')
 	println('Service management:')
-	println('  --install-service      Install as a system service (auto-detects OS)')
-	println('  --uninstall-service    Uninstall the system service')
-	println('  --service-status       Check if the service is installed and running')
+	println('  --install-service         Install as a system service (auto-detects OS)')
+	println('  --uninstall-service       Uninstall the system service')
+	println('  --service-status          Check if the service is installed and running')
+	println('')
+	println('Docker deployment:')
+	println('  --install-docker <dir>          Generate docker-compose stack in <dir>')
+	println('  --install-docker-prometheus <dir>  Generate docker-compose + Prometheus stack')
 	println('')
 	println('Config:')
 	println('  Copy ntfy-bridge.example.yaml → ntfy-bridge.yaml and edit it.')