add GitLab CI to the CI docs
authorDoug Goldstein <cardoe@cardoe.com>
Sun, 27 May 2018 19:28:54 +0000 (14:28 -0500)
committerDoug Goldstein <cardoe@cardoe.com>
Sun, 27 May 2018 20:17:16 +0000 (15:17 -0500)
commitf84ec4fc5523472806669c9ae2afa763ee3837ce
treee9de7f0aa8914aa88a6d3b1ca12c1c8d92e42c8f
parent9c78c3a17ac4bc0c8b3b837095f60aa84d09c426
add GitLab CI to the CI docs

Cargo supports GitLab CI natively for CI badges so include a basic
example of how to use it in the CI section of the documentation.
src/doc/src/guide/continuous-integration.md