[WIP] add viper to manage envvars and cfg files

Former-commit-id: 99d241dc790629791b67b7b2ce20a10341a1c1e7 [formerly 08e8410bffdb50134a2d6ccbe853b25d4c4d3fc6] [formerly f32b18d9acb42ee1988c49b7980a16a606cee142 [formerly 1080bfde680d9d87271e63e6253450595e1f5c05]]
Former-commit-id: 318c4f159697e896bcf824e274907c5c03046bf0 [formerly 82533ae817673dfab8d56533f15a9931c0c74c1e]
Former-commit-id: ece42aa8e8c7480a5a21614b6ca397b71a01e1fa

cmd/import.go

@@ -3,6 +3,7 @@ package cmd
 import (
 	"github.com/filebrowser/filebrowser/v2/storage/bolt/importer"
 	"github.com/spf13/cobra"
+	v "github.com/spf13/viper"
 )
 
 func init() {
@@ -24,7 +25,7 @@ this version.`,
 		oldDB := mustGetString(cmd, "old.database")
 		oldConf := mustGetString(cmd, "old.config")
 
-		err := importer.Import(oldDB, oldConf, databasePath)
+		err := importer.Import(oldDB, oldConf, v.GetString("database"))
 		checkErr(err)
 	},
 }