cicd: removed windows linebreak

.gitlab-ci.yml

@@ -7,8 +7,8 @@ deploy_staging:
   stage: deploy
   environment: staging
   script:
-    - echo $APP_CONFIG > config.json
-    - echo -n "$SSH_PRIVATE_KEY" | tr -d '\r' > gitlab.key && chmod 600 gitlab.key
+    - echo "$APP_CONFIG" > config.json
+    - echo "$SSH_PRIVATE_KEY" | tr -d '\r' > gitlab.key && chmod 600 gitlab.key
     - cat gitlab.key
     - npm install
     - npm run build