Add docker info

README.md

@@ -14,5 +14,18 @@ Add your Steam API Key as user-secrets like this:
 
 After that set up your redirect URI, ClientID and ClientSecret in the appsettings.json.
 
+## Docker
+[A docker image](https://hub.docker.com/r/imperialplugins/steam-openid-connect-proxy) is also available.
+
+```
+docker run -it \
+    -e OpenID__RedirectUri=http://localhost:8080/auth/realms/master/broker/steam/endpoint \
+    -e OpenID__ClientID=steam_proxy \ 
+    -e OpenID__ClientSecret=mysecret \
+	-e Authentication__Steam__ApplicationKey=MySteamApiKey \
+    --restart unless-stopped \
+    --name steamopenidconnectproxy \
+    imperialplugins/steam-openid-connect-proxy
+```
 ## License
 [MIT](https://github.com/ImperialPlugins/SteamOpenIdConnectProxy/blob/master/LICENSE)