Add all markdown files to dockerignore

.dockerignore

diff --git a/.dockerignore b/.dockerignore
index b38b546..e1bbe2a 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,5 +1,5 @@
 .git/
-CONTRIBUTING.md
+*.md
 Dockerfile
 LICENSE
 NOTICE