Add a note on HTTPS to the README

diff --git a/README.md b/README.md
index 057ef673d34bc7ce8b72c1c34defaf1fcced9fe8..5bc81d0f03e69dd7c0c64a86ea6217d459b2f414 100644 (file)
--- a/README.md
+++ b/README.md
@@ -139,6 +139,11 @@ For example:
   ROUNDCUBEMAIL_PLUGINS: thunderbird_labels, show_folder_size, tls_icon
 ```
 
+## HTTPS
+
+Currently all images are configured to speak HTTP. To provide HTTPS please run an additional reverse proxy in front of them, which handles certificates and terminates TLS. Alternatively you could derive from our images (or use the advanced configuration methods) to make Apache or nginx provide HTTPS – but please refrain from opening issues asking for support with such a setup.
+
+
 ## Examples
 
 A few example setups using `docker-compose` can be found in our [Github repository](https://github.com/roundcube/roundcubemail-docker/tree/master/examples).