Use variables instead of hardcoded references in CI pipeline

.gitlab-ci.yml

@@ -1,5 +1,5 @@
 include:
-  - component: gitlab.com/$CI_PROJECT_PATH/sast@$CI_COMMIT_SHA
+  - component: $CI_SERVER_FQDN/$CI_PROJECT_PATH/sast@$CI_COMMIT_SHA
 
 stages: [test, release]
 
@@ -7,7 +7,7 @@ ensure-brakeman-job-added:
   image: badouralix/curl-jq
   script:
     - |
-      route="https://gitlab.com/api/v4/projects/$CI_PROJECT_ID/pipelines/$CI_PIPELINE_ID/jobs"
+      route="$CI_API_V4_URL/projects/$CI_PROJECT_ID/pipelines/$CI_PIPELINE_ID/jobs"
       count=`curl --silent $route | jq 'map(select(.name | contains("brakeman-sast"))) | length'`
       if [ "$count" != "1" ]; then
         exit 1
@@ -21,7 +21,7 @@ check-description:
   image: badouralix/curl-jq
   script:
     - |
-      route="https://gitlab.com/api/v4/projects/$CI_PROJECT_ID"
+      route="$CI_API_V4_URL/projects/$CI_PROJECT_ID"
       desc=`curl --silent $route | jq '.description'`
       if [ "$desc" = "null" ]; then
         echo "Description not set. Please set a projet description"