refactor: restructure hub initialization and startup process

- Separated hub initialization logic into distinct methods
- Move command specific things to cmd/hub
- Add compatibility with new systems package

beszel/cmd/hub/hub.go

@@ -1,10 +1,46 @@
 package main
 
 import (
+	"beszel"
 	"beszel/internal/hub"
 	_ "beszel/migrations"
+	"os"
+
+	"github.com/pocketbase/pocketbase"
+	"github.com/pocketbase/pocketbase/plugins/migratecmd"
+	"github.com/spf13/cobra"
 )
 
 func main() {
-	hub.NewHub().Run()
+	baseApp := getBaseApp()
+	h := hub.NewHub(baseApp)
+	h.BootstrapHub()
+	h.Start()
+}
+
+// getBaseApp creates a new PocketBase app with the default config
+func getBaseApp() *pocketbase.PocketBase {
+	isDev := os.Getenv("ENV") == "dev"
+
+	baseApp := pocketbase.NewWithConfig(pocketbase.Config{
+		DefaultDataDir: beszel.AppName + "_data",
+		DefaultDev:     isDev,
+	})
+	baseApp.RootCmd.Version = beszel.Version
+	baseApp.RootCmd.Use = beszel.AppName
+	baseApp.RootCmd.Short = ""
+	// add update command
+	baseApp.RootCmd.AddCommand(&cobra.Command{
+		Use:   "update",
+		Short: "Update " + beszel.AppName + " to the latest version",
+		Run:   hub.Update,
+	})
+
+	// enable auto creation of migration files when making collection changes in the Admin UI
+	migratecmd.MustRegister(baseApp, baseApp.RootCmd, migratecmd.Config{
+		Automigrate: isDev,
+		Dir:         "../../migrations",
+	})
+
+	return baseApp
 }