feat: configure HTTP/HTTPS public entry and managed certificates

backend/internal/api/api.go

@@ -335,6 +335,7 @@ func (s *Server) RegisterRoutes(r *gin.Engine) {
 		admin.GET("/system/tls/nginx-setup", s.nginxSetupStatus)
 		admin.POST("/system/tls/nginx-setup", s.initializeNginx)
 		admin.POST("/system/tls/nginx-activate", s.activateNginx)
+		admin.POST("/system/tls/certificate", s.uploadTLSCertificate)
 		admin.GET("/users", s.listUsers)
 		admin.POST("/users", s.createUser)
 		admin.PUT("/users/:id", s.updateUser)