CI updates to trigger a tpo/web/community build (#1)

Change GitLab CI/CD configuration to allow deployment under community.torproject.org/onion-services/ecosystem.

.gitlab-ci.yml

@@ -13,6 +13,7 @@ build:
   stage: build
   script:
     - !reference [.apt-init]
+    - apt-get install -y git
     - vendors/onion-mkdocs/scripts/onion-mkdocs-provision-build
     - scripts/compile
     - vendors/onion-mkdocs/scripts/onion-mkdocs-build