CI dependencies.

Set the dependencies between jobs (for images that depend on other
images in this repo).

.gitlab-ci.yml

@@ -28,6 +28,8 @@ build-cgit:
   extends: .container-build
   variables:
     CONTEXT: cgit
+  needs:
+    - job: push-httpd
 
 push-cgit:
   extends: .container-push
@@ -138,6 +140,8 @@ build-webdav:
   extends: .container-build
   variables:
     CONTEXT: webdav
+  needs:
+    - job: push-httpd
 
 push-webdav:
   extends: .container-push
@@ -170,6 +174,8 @@ build-youtube-dl:
   extends: .container-build
   variables:
     CONTEXT: youtube-dl
+  needs:
+    - job: push-toolbx
 
 push-youtube-dl:
   extends: .container-push
@@ -218,6 +224,8 @@ build-workbench:
   extends: .container-build
   variables:
     CONTEXT: workbench
+  needs:
+    - job: push-toolbx
 
 push-workbench:
   extends: .container-push