Add Debian Jessie build image

This image is meant to be used to build packages for the Jessie release of Debian. See debian/nginx-build.

.gitlab-ci.yml

@@ -55,7 +55,7 @@ build-debian-jessie-build-dev:
   stage: deploy
   script:
     - docker build --pull -t "$CI_REGISTRY_IMAGE/debian:jessie-dev" ./debian/jessie
-    - docker push "$CI_REGISTRY_IMAGE/deiban:jessie-dev"
+    - docker push "$CI_REGISTRY_IMAGE/debian:jessie-dev"
   except:
     - master