docs: describe using a custom URL with create-turbo.

docs/repo-docs/getting-started/installation.mdx

@@ -128,21 +128,37 @@ The community curates a set of examples to showcase ways to use common tools and
 <PackageManagerTabs>
 <Tab>
 ```bash title="Terminal"
+# Use an example listed below
 npx create-turbo@latest --example [example-name]
-```
+
+# Use a GitHub repository from the community
+
+npx create-turbo@latest --example [github-url]
+
+````
 
 </Tab>
 
 <Tab>
 ```bash title="Terminal"
+# Use an example listed below
 yarn dlx create-turbo@latest --example [example-name]
-```
+
+# Use a GitHub repository from the community
+yarn dlx create-turbo@latest --example [github-url]
+````
 
 </Tab>
 
 <Tab>
 ```bash title="Terminal"
+# Use an example listed below
 pnpm dlx create-turbo@latest --example [example-name]
+
+# Use a GitHub repository from the community
+
+pnpm dlx create-turbo@latest --example [github-url]
+
 ```
 
 </Tab>
@@ -152,3 +168,4 @@ pnpm dlx create-turbo@latest --example [example-name]
 Use any of the example's names below:
 
 <ExamplesTable />
+```

docs/repo-docs/reference/create-turbo.mdx

@@ -59,6 +59,34 @@ Use any of the example's names below:
 
 <ExamplesTable />
 
+### Use a community example
+
+You can also use a custom starter or example by using a GitHub URL. This is useful for using your own custom starters or examples from the community.
+
+<PackageManagerTabs>
+<Tab>
+```bash title="Terminal"
+npx create-turbo@latest --example [github-url]
+```
+
+</Tab>
+
+<Tab>
+```bash title="Terminal"
+yarn dlx create-turbo@latest --example [github-url]
+```
+
+</Tab>
+
+<Tab>
+```bash title="Terminal"
+pnpm dlx create-turbo@latest --example [github-url]
+```
+
+</Tab>
+
+</PackageManagerTabs>
+
 ## Options
 
 ```txt title="Terminal"