Resolve "move to gitlab and Automize pdfenize markdown document"

It is correct that the pipeline exits with warnings due to one linting error that seems to be a bug.

Closes #10 (closed)

.markdownlint.json

 {
   "default": true,
-  "MD013": { "line_length": 120 }
+  "MD013": { "line_length": 120 },
+  "MD024": { "siblings_only": true }
 }
\ No newline at end of file