update document to expand on param defaults

Signed-off-by: schristoff <28318173+schristoff@users.noreply.github.com>
getporter · Sep 25, 2023 · 0d078e8 · 0d078e8
1 parent 39a3c49
commit 0d078e8
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diff --git a/docs/content/wiring.md b/docs/content/wiring.md
@@ -51,6 +51,15 @@ You can also provide any other attributes, as specified by the CNAB [parameters]
   default: "wordpress"
 ```
 
+If using the default parameter field it must be set. However, it must be passed in as an empty
+type. For example, for an empty string, pass in `""` as the default, or for an object use `{}`:
+
+```yaml
+- name: command
+  type: object
+  default: {}
+```
+
 ### File Parameters
 
 Porter also enables the use of file parameters in a bundle.