Move gitea api calls in own "client" package (#78)

continue #75
close #16
- fix regression (from #34) _thanks to @crystal_
- create own gitea client package
- more logging
- add mock impl of CertDB

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: crystal <crystal@noreply.codeberg.org>
Reviewed-on: https://codeberg.org/Codeberg/pages-server/pulls/78
Reviewed-by: crapStone <crapstone@noreply.codeberg.org>

cmd/certs.go

@@ -61,7 +61,7 @@ func removeCert(ctx *cli.Context) error {
 
 	for _, domain := range domains {
 		fmt.Printf("Removing domain %s from the database...\n", domain)
-		if err := keyDatabase.Delete([]byte(domain)); err != nil {
+		if err := keyDatabase.Delete(domain); err != nil {
 			return err
 		}
 	}