Add port to default yaml
diff --git a/aardvark.yaml b/aardvark.yaml
index 2aecced..b78abe6 100644
--- a/aardvark.yaml
+++ b/aardvark.yaml
@@ -1,3 +1,6 @@
+# Port for Aardvark to listen on
+port: 4321
+
 # Which backend to proxy to if request is kosher
 proxy_url: "http://localhost:8009/"