Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -0,0 +1,17 @@
+# you can delete this line if you're not using Docker
+#image: busybox:latest
+
+shellcheck:
+  stage: test
+  image: registry.gitlab.com/pipeline-components/shellcheck:latest
+  script:
+    # anything ending on .sh, should be shell script
+    - |
+      find . -name .git -type d -prune -o -type f  -name \*.sh -print0 |
+      xargs -0 -P $(nproc) -r -n1 shellcheck
+    # magic, any file with a valid shebang should be scanned aswell
+    - |
+      find . -name .git -type d -prune -o -type f  -regex '.*/[^.]*$'   -print0 |
+      xargs -0 -P $(nproc) -r -n1 sh -c 'FILE="$0"; if head -n1 "$FILE" |grep -q "^#\\! \?/.\+\(ba|d|k\)\?sh" ; then shellcheck "$FILE" ; else /bin/true ; fi '
+
+