Add instructions for running the sample app locally (#36952)

Author: guardrex

aspnetcore/blazor/tutorials/movie-database-app/index.md

@@ -45,6 +45,28 @@ For Microsoft Azure services, we recommend using *managed identities*. Managed i
 
 If you don't intend to create the demonstration app while reading the article, you can refer to the completed sample app in the [Blazor samples GitHub repository (`dotnet/blazor-samples`)](https://github.com/dotnet/blazor-samples). Select the latest version folder in the repository. The sample folder for this tutorial's project is named `BlazorWebAppMovies`.
 
+To run the sample locally, apply the pending migrations, which include a migration to create the database. Use the following instructions:
+
+If the [`dotnet-ef` tool](/ef/core/miscellaneous/cli/dotnet) isn't installed, install the tool with the following command from either a command shell, the Developer PowerShell command shell in Visual Studio, or the **Terminal** PowerShell command shell in VS Code:
+
+```dotnetcli
+dotnet tool install --global dotnet-ef
+```
+
+From a command shell opened to the project's root folder (the project directory containing the `BlazorWebAppMovies.csproj` file), execute the following command:
+
+```dotnetcli
+dotnet ef database update
+```
+
+After executing the preceding command, run the sample using any of the following approaches:
+
+* Visual Studio
+  * Select the **Run** button.
+  * Use **Debug** > **Start Debugging** from the menu.
+  * Press <kbd>F5</kbd>.
+* .NET CLI command shell: Execute the `dotnet watch` (or `dotnet run`) command from the project's root folder.
+
 ## Article code examples
 
 The line breaks of code examples shown in the ASP.NET Core documentation often don't match line breaks in scaffolded code generated by tooling for an app. This is due to an article publishing limitation. Lines of code in articles are generally limited to 85 characters in length, and we manually adjust the line length using line breaks to satisfy our publishing guidelines.