use ssh in ci script

.gitlab-ci.yml

@@ -11,7 +11,6 @@ job1:
         script: 
                 - echo "Hallo"
                 - echo "Welt"
-                - echo "$SSH_PRIVATE_KEY"
 
 job2:
         stage: hello
@@ -39,6 +38,12 @@ job3:
                 - apt install -y msp430-libc
                 - apt install -y binutils-msp430
                 - apt install -y gcc-msp430
+                - eval $(ssh-agent -s)
+                - echo "$SSH_PRIVATE_KEY" | ssh-add
+                - mkdir -p ~/.ssh
+                - chmod 700 ~/.ssh
+                - ssh-keyscan gitlab.com >> ~/.ssh/known_hosts
+                - chmod 644 ~/.ssh/known_hosts
         script:
                 - make clean
                 - make all