finished documentation for installation, database usage and authentication

docs/installation/WebAPI.md

@@ -0,0 +1,17 @@
+# Ho to use the Web API version
+This Installation adds all HopFrame [endpoints](../endpoints) and [services](../services) to the application.
+
+1. Add the HopFrame.Api library to your project:
+
+   ```
+   dotnet add package HopFrame.Api
+   ```
+
+2. Create a [DbContext](./Database.md) that inherits the ``HopDbContext`` and add a data source
+   <p>&nbsp;</p>
+
+3. Add the HopFrame services to your application, provide the previously created `DatabaseContext` that inherits from `HopDbContextBase`
+
+   ```csharp
+   builder.Services.AddHopFrame<DatabaseContext>();
+   ```