Add Marge Bot for GitLab.

Change-Id: If55bfe39ffe023474e8db71df4dbdce6491f1b05
diff --git a/marge/.gitignore b/marge/.gitignore
new file mode 100644
index 0000000..75002e0
--- /dev/null
+++ b/marge/.gitignore
@@ -0,0 +1 @@
+/secret.yaml
\ No newline at end of file