Add mention of QUARTO_PROFILE to render with a profile

Related to discussion at #108

publish/README.md

@@ -92,3 +92,17 @@ The `with` parameter can also be set to configure the following
 
 * `path`: Subdirectory containing the quarto project to be published or path to individual .qmd file. Default to working directory (`.`)
 * `render`: Set to `render: "false"` to skip rendering of project before publishing. By default, this `publish` action will render to all formats defined.
+
+## Rendering with a Quarto profile
+
+`quarto publish` will render first by default. You can render with a specific profile by setting the `QUARTO_PROFILE` environment variable. For example, to publish the version correspondig with the `preview` profile of your website (i.e. you have a `_quarto-preview.yml` file in your project), you can do:
+
+```yaml
+- name: Render Quarto Project
+  uses: quarto-dev/quarto-actions/render@v2
+  env:
+    GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # this secret is always available for github actions
+    QUARTO_PROFILE: preview
+  with:
+    target: gh-pages
+```

render/README.md

@@ -9,3 +9,16 @@
 ```
 
 `path:` can be a path to a subdirectory containing the quarto project to be rendered or a path to a single .qmd file
+
+## Rendering with a Quarto profile
+
+You can render with a specific profile by setting the `QUARTO_PROFILE` environment variable. For example, to render with the `preview` profile (i.e. you have a `_quarto-preview.yml` file in your project), you can do:
+
+```yaml
+- name: Render Quarto Project
+  uses: quarto-dev/quarto-actions/render@v2
+  env:
+    QUARTO_PROFILE: preview
+  with:
+    to: html
+```