Merge branch '295-document-gitlab-architecture' into 'master'

Resolve "Document GitLab package architecture in charter"

Closes #295

See merge request platform-one/big-bang/bigbang!462

(cherry picked from commit f23e4767)

ce61e890 Documented the current integration with the Gitlab package to the Bigbang main
49c2f482 Trying to fix the merge request that doesnt seem to have pushed the code.
0f40f221 Changing a typo and removing the EOF I added to get the file to push.