Update .gitlab-ci.yml

.gitlab-ci.yml

@@ -5,8 +5,7 @@ image: pawedla/test:latest
 
 build:
   before_script:
-  - apt-get install apt-transport-https ca-certificates -y
-  - update-ca-certificates
+  - openssl s_client -connect gitlab.ce.jku.at:443
   - cat /etc/ssl/certs/ca-certificates.crt
   - git checkout $CI_COMMIT_REF_NAME
   - GIT_SSL_CAINFO=${CI_SERVER_TLS_CA_FILE} git pull