Setup and migration UI refactor (#1190)

* Make config instance-based
* Remove config dependency in paths
* Refactor config init
* Allow startup without database
* Get system status at UI initialise
* Add setup wizard
* Cache and Metadata optional. Database mandatory
* Handle metadata not set during full import/export
* Add links
* Remove config check middleware
* Stash not mandatory
* Panic on missing mandatory config fields
* Redirect setup to main page if setup not required
* Add migration UI
* Remove unused stuff
* Move UI initialisation into App
* Don't create metadata paths on RefreshConfig
* Add folder selector for generated in setup
* Env variable to set and create config file.
Make docker images use a fixed config file.
* Set config file during setup

main.go

@@ -3,9 +3,7 @@ package main
 
 import (
 	"github.com/stashapp/stash/pkg/api"
-	"github.com/stashapp/stash/pkg/database"
 	"github.com/stashapp/stash/pkg/manager"
-	"github.com/stashapp/stash/pkg/manager/config"
 
 	_ "github.com/golang-migrate/migrate/v4/database/sqlite3"
 	_ "github.com/golang-migrate/migrate/v4/source/file"
@@ -13,12 +11,6 @@ import (
 
 func main() {
 	manager.Initialize()
-
-	// perform the post-migration for new databases
-	if database.Initialize(config.GetDatabasePath()) {
-		manager.GetInstance().PostMigrate()
-	}
-
 	api.Start()
 	blockForever()
 }