Minor tweaks to 6

Author: davidfowl

docs/6. Production Readiness and Deployment.md

@@ -1,7 +1,8 @@
 # Production Readiness and Deployment
 
 ## Adding EF Healthchecks to the BackEnd
-1. Add a package reference to **Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore** version 2.2.0.
+1. Add a reference to the NuGet package `Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore` version `2.2.0`.
+    > This can be done from the command line using `dotnet add package Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore --version 2.2.0`
 1. Add a DbContext health check in `Startup.cs` by adding the following code to `ConfigureServices`:
    ```csharp
    services.AddHealthChecks()
@@ -11,7 +12,10 @@
 1. Test the end point by navigating to `/health`, it should return the text `Healthy`.
 
 ## Adding EF Healthchecks to the FrontEnd
-1. Add a package reference to **Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore** version 2.2.0.
+1. Add a reference to the NuGet package `Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore` version `3.0.0-preview6.19307.2`.
+    > This can be done from the command line using `dotnet add package Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore --version 3.0.0-preview6.19307.2`
+
+    > Note: The `FrontEnd` and `BackEnd` projects have different versions of this package because they reference different versions of EntityFrameworkCore.
 1. Add a DbContext health check in `Startup.cs` by adding the following code to `ConfigureServices`:
    ```csharp
    services.AddHealthChecks()
@@ -21,7 +25,14 @@
 1. Test the end point by navigating to `/health`, it should return the text `Healthy`.
 
 ## Adding a custom health check to test for BackEnd availability
-1. Add a `Task<bool> CheckHealthAsync()` method to `IApiClient`.
+1. Add a `CheckHealthAsync` method to `IApiClient`.
+   ```c#
+   public interface IApiClient
+   {
+       ...
+       Task<bool> CheckHealthAsync();
+   }
+   ```
 1. Implement the `CheckHealthAsync` method in `ApiClient` by adding the following code:
     ```csharp
     public async Task<bool> CheckHealthAsync()
@@ -76,7 +87,7 @@
     ```csharp
     services.AddHealthChecks()
             .AddCheck<BackendHealthCheck>("backend")
-           .AddDbContextCheck<IdentityDbContext>();
+            .AddDbContextCheck<IdentityDbContext>();
     ```
 1. Test the end point by navigating to `/health`, it should return the text `Healthy`.