docs: Improve docker hosting information

bagetter#205, bagetter#197

docs/docs/Installation/docker.md

@@ -22,6 +22,7 @@ For a full list of configurations, please refer to [BaGetter's configuration](..
 
 The `bagetter.env` file stores [BaGetter's configuration](../configuration) as environment variables.
 To learn how these configurations work, please refer to [ASP.NET Core's configuration documentation](https://docs.microsoft.com/en-us/aspnet/core/fundamentals/configuration/?view=aspnetcore-2.1&tabs=basicconfiguration#configuration-by-environment).
+Alternatively, the configuration can be injected via environment variables directly, e.g. the `environment` array in a docker compose file or the `--env` flag in a `docker run` command.
 
 :::
 
@@ -93,3 +94,8 @@ You can load symbols by using the following symbol location:
 `http://localhost:5000/api/download/symbols`
 
 For Visual Studio, please refer to the [Configure Debugging](https://docs.microsoft.com/en-us/visualstudio/debugger/specify-symbol-dot-pdb-and-source-files-in-the-visual-studio-debugger?view=vs-2017#configure-symbol-locations-and-loading-options) guide.
+
+## Running BaGetter behind a reverse proxy
+
+BaGetter can be run behind a reverse proxy in order to provide HTTPS, your own domain, and other features. For the API to deliver proper URLs, the proxy needs to forward the `X-Forwarded-Host` header.  
+For more information, please refer to the [ASP.NET Core documentation](https://docs.microsoft.com/en-us/aspnet/core/host-and-deploy/proxy-load-balancer).