fix(agent): minimal env and explicit project dir for compose, resolve every config file's symlinks (#7)

internal/agent/updater/registryauth.go

@@ -3,7 +3,6 @@ package updater
 import (
 	"encoding/base64"
 	"encoding/json"
-	"errors"
 	"fmt"
 	"log/slog"
 	"os"
@@ -64,7 +63,7 @@ func LoadRegistryAuth(dockerConfigDir string, log *slog.Logger) (*RegistryAuth,
 			}
 			user, pass, ok := strings.Cut(string(dec), ":")
 			if !ok {
-				return nil, errors.New(path + ": auth for " + key + " is not user:password")
+				return nil, fmt.Errorf("%s: auth for %s is not user:password", path, key)
 			}
 			ac.Username, ac.Password = user, pass
 		default: