Create Docker base template

.gitlab-ci.yml

@@ -5,16 +5,20 @@ build:
   script:
     - cargo-leptos build
 
-# Build the docker image and push it to the registry
-docker-build:
-  needs: ["build"]
+.docker:
   image: docker:latest
   services:
     - docker:dind
   tags:
     - docker
-  script:
+  before_script:
     - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+
+# Build the docker image and push it to the registry
+docker-build:
+  needs: ["build"]
+  extends: .docker
+  script:
     - docker build -t $CI_REGISTRY_IMAGE:$CI_COMMIT_SHORT_SHA .
       # If running on the default branch, tag as latest
     - if [ "$CI_COMMIT_BRANCH" == "$CI_DEFAULT_BRANCH" ]; then docker tag