fix tags

.gitlab-ci.yml

@@ -5,14 +5,14 @@ stages:
 Check Makefile:
   stage: verify
   tags:
-    - shell, docker
+    - linux, dockerd
   script:
     - docker run --rm -v "${PWD}:/work" -w /work mandrean/checkmake ./Makefile
 
 Lint and Validate dockerfiles:
   stage: verify
   tags:
-    - shell, docker
+    - linux, dockerd
   script:
     - make test
 
@@ -20,6 +20,6 @@ Make All Images:
   stage: build
   image: projectatomic/dockerfile-lint
   tags:
-    - shell, docker
+    - linux, dockerd
   script:
     - make 
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