Revert "Revert "feat: Support config files with viper"" (#4693)

cli/config/file.go

@@ -6,6 +6,10 @@ import (
 	"path/filepath"
 )
 
+const (
+	FlagName = "global-config"
+)
+
 // Root represents the configuration directory.
 type Root string
 
@@ -42,6 +46,10 @@ func (r Root) PostgresPort() File {
 	return File(filepath.Join(r.PostgresPath(), "port"))
 }
 
+func (r Root) DeploymentConfigPath() string {
+	return filepath.Join(string(r), "server.yaml")
+}
+
 // File provides convenience methods for interacting with *os.File.
 type File string