Add example aws_parameters file and gitignore

.gitignore

@@ -13,3 +13,4 @@ alerts/generic_alerts
 /.project
 /data
 .vscode
+cloudy_mozdef/aws_parameters.json

cloudy_mozdef/aws_parameters.example.json

@@ -0,0 +1,7 @@
+[
+  {
+    "ParameterKey": "OIDCClientSecret",
+    "ParameterValue": "secret-goes-here",
+    "UsePreviousValue": false
+  }
+]