docs(config): add docs config page/option to root config (#1485)

docs/config/01-overview.md

@@ -94,6 +94,10 @@ stencil-project-root
 
 Please see the [Dev-Server docs](./dev-server.md).
 
+## docs
+
+Please see the [docs config](./docs.md).
+
 ## enableCache
 
 *default: `true`*

docs/config/docs.md

@@ -0,0 +1,44 @@
+---
+title: Documentation Generation Config
+sidebar_label: Docs Config
+description: Documentation Generation Config
+slug: /docs-config
+---
+
+# Docs Config
+
+The `docs` config option allows global configuration of certain behaviors related to [documentation generation output targets](../documentation-generation/01-overview.md).
+
+:::note
+These configurations are **global** and will be applied to all output target instances including those defined in the [`outputTargets`](../output-targets/01-overview.md)
+configuration, as well as those injected by CLI flags (like `--docs`).
+:::
+
+## markdown
+
+The `markdown` config object allows certain customizations for markdown files generated by the [`docs-readme` output target](../documentation-generation/docs-readme.md) or the
+`--docs` CLI flag.
+
+### targetComponent
+
+**Optional**
+
+**Default: `{ textColor: '#333', background: '#f9f' }`**
+
+This option allows you to change the colors used when generating the dependency graph mermaid diagrams for components. Any hex color string is a valid
+value.
+
+```tsx title="stencil.config.ts"
+import { Config } from '@stencil/core';
+
+export const config: Config = {
+  docs: {
+    markdown: {
+      targetComponent: {
+        textColor: '#fff',
+        background: '#000',
+      },
+    },
+  },
+};
+```