gerrit: auto configure ssh keys

Change-Id: I9c3091e4bb998fa6c846c3c60c2801c7daa45bcf
diff --git a/core/installer/keys.go b/core/installer/keys.go
index d3dd1d7..3e3d84c 100644
--- a/core/installer/keys.go
+++ b/core/installer/keys.go
@@ -7,3 +7,7 @@
 func NewSSHKeyPair(path string) (*keygen.KeyPair, error) {
 	return keygen.New(path, keygen.WithKeyType(keygen.Ed25519))
 }
+
+func NewECDSASSHKeyPair(path string) (*keygen.KeyPair, error) {
+	return keygen.New(path, keygen.WithKeyType(keygen.ECDSA))
+}