[librsvg-oci-images] Revert "Pass the docker password through stdin, not an env var"

[Jordan Petridis <jpetridis src gnome org>]

commit 598bade66189f15e419709330f6eedde182ced7d
Author: Jordan Petridis <jordanpetridis protonmail com>
Date:   Sat Jun 23 23:09:23 2018 +0000

    Revert "Pass the docker password through stdin, not an env var"
    
    This reverts commit 2b6f81745d01cfed08106cb3db860750793fe8f4

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 325b621..5808fa6 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -17,7 +17,7 @@ stages:
 .base_template: &base_build
     script:
         - cd ${DIR}
-        - echo ${CI_JOB_TOKEN} | docker login -u gitlab-ci-token --password-stdin $CI_REGISTRY
+        - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY
         - docker build --pull -f ${OCI_YML} -t ${IMAGE} .
         - docker push ${IMAGE}