Contrib structure

doc.zih.tu-dresden.de/docs/contrib/contribute_container.md

@@ -110,7 +110,8 @@ $DC 'find docs -type f -name "*.md" | xargs -L1 markdown-link-check'
 For spell-checking a single file, , e.g.
 `doc.zih.tu-dresden.de/docs/software/big_data_frameworks.md`, use:
 
-```$DC './util/check-spelling.sh docs/software/big_data_frameworks.md'
+```Bash
+$DC './util/check-spelling.sh docs/software/big_data_frameworks.md'
 ```
 
 For spell-checking all files, use: