Add Dockerfile and GitLab CI Pipeline

Change-Id: Iafef7b6388667cf2d45c79a4a0e5d0eea224afba
diff --git a/.gitignore b/.gitignore
index 4b3dd5a..93c04be 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,11 +1,13 @@
 blib
 MYMETA*
 Makefile
-Dockerfile
+!Dockerfile
 pm_to_blib
 \#*
 *~
 .*
 !.gitignore
 !.github
+!.dockerignore
+!.gitlab-ci.yml
 /sandbox