Document docker changes. set up for 2.3.0 release.

Author: rouilj

CHANGES.txt

@@ -12,6 +12,19 @@ v2.7.2 or later are required to run newer releases of Roundup.
 Roundup 2.0 supports Python 3.4 and later. Roundup 2.1.0 supports
 python 3.6 or newer (3.4/3.5 might work, but they are not tested).
 
+2023-xx-yy 2.3.0
+
+Fixed:
+
+- Dockerfile healthcheck fixed so it works when trackers are specified
+  on command line. Also cleanup of unneeded packages.
+
+
+Features:
+
+- Dockerfile build allows adding additional python packages via pip,
+  setting UID traker is run under.
+
 2022-07-13 2.2.0
 
 Fixed: