Optimize docker configuration

Change-Id: I435e8e21f1088cf1688bc197bd3eab3bcc94da6e
diff --git a/.dockerignore b/.dockerignore
index b20b3cf..b52276f 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -11,4 +11,7 @@
 !/script
 !/t
 !/templates
-!.dockerignore
\ No newline at end of file
+!.dockerignore
+/templates/announcement.html.ep
+/templates/custom
+/lib/Kalamar/Plugin/Announcements.pm