chore: add logging to ignore command

Author: ascorbic

demos/nx-next-monorepo-demo/netlify.toml

@@ -1,7 +1,7 @@
 [build]
 command = "npm run build"
 publish = "dist/apps/demo-monorepo/.next"
-ignore = "git diff --exit-code $CACHED_COMMIT_REF $COMMIT_REF ../../"
+ignore = "echo CACHED_COMMIT_REF: $CACHED_COMMIT_REF COMMIT_REF: $COMMIT_REF && git diff --exit-code $CACHED_COMMIT_REF $COMMIT_REF ../../"
 
 [dev]
 command = "npm run start"