feat(oidc): support token refreshing via offline_access scope

- refactored code
- moved api/v1/auth to auth/
- security enhancement
- env example update
- default jwt ttl changed to 24 hours

internal/common/constants.go

@@ -23,6 +23,8 @@ const (
 	ComposeFileName        = "compose.yml"
 	ComposeExampleFileName = "compose.example.yml"
 
+	DataDir = "data"
+
 	ErrorPagesBasePath = "error_pages"
 
 	AgentCertsBasePath = "certs"