WIP: Add git to code-style stage

.gitlab-ci.yml

@@ -27,6 +27,8 @@ code-style:
   image: julia:1.6
   tags: [ docker ]
   script:
+    # install git
+    - apt-get install git
     # install JuliaFormatter
     - julia  -e 'using Pkg; Pkg.add(PackageSpec(name="JuliaFormatter"))'
     # try and format the files