Add .gitreview file with configuration

Change-Id: I2bfa37922f2f4f43d5855ac414f5e65e8e384caa
diff --git a/.gitreview b/.gitreview
new file mode 100644
index 0000000..5dc8304
--- /dev/null
+++ b/.gitreview
@@ -0,0 +1,3 @@
+[gerrit]
+defaultbranch=main
+project=Clicks/NixFiles.git
\ No newline at end of file