news: add entry for edge-container using nginx

Signed-off-by: Achilleas Koutsou <achilleas@koutsou.net>

docs/news/unreleased/edge-container-nginx.md

@@ -0,0 +1,9 @@
+# RHEL-Edge container image now uses nginx and serves on port 8080
+
+Previously, the edge-container image type was unable to run in unprivileged
+mode which prevented it from being used on OpenShift 4.  The container now uses
+nginx to serve the commit and a configuration that allows it to run as a
+non-root user inside the container.  The internal web server now uses port
+`8080` instead of `80`.
+
+See rhbz#1945238