Merge pull request #7988 from erictleung/fix/add-resource-on-ssh-github

Add article to setup SSH keys for GitHub and Git

seed/challenges/03-back-end-development-certification/git.json

@@ -17,10 +17,11 @@
         "Click the \"Create workspace\" button.",
         "Once C9 builds and loads your workspace, you should see a terminal window in the lower right hand corner. In this window use the following commands. You don't need to know what these mean at this point.",
         "Install <code>git-it</code> with this command: <code>npm install -g git-it</code>",
+        "Before you start, read <a href='https://help.github.com/articles/adding-a-new-ssh-key-to-your-github-account/' target='_blank'>Adding a new SSH key to your GitHub account</a> if you have two-factor authentication set up on your GitHub account.",
         "Now start the tutorial by running <code>git-it</code>.",
         "Note that you can resize the c9.io's windows by dragging their borders.",
         "Make sure that you are always in your project's \"workspace\" directory. You can always navigate back to this directory by running this command: <code>cd ~/workspace</code>.",
-        "You can view this Node School module's source code on GitHub at <a href='https://github.com/jlord/git-it'>https://github.com/jlord/git-it</a>.",
+        "You can view this Node School module's source code on GitHub at <a href='https://github.com/jlord/git-it' target='_blank'>https://github.com/jlord/git-it</a>.",
         "Complete \"Get Git\"",
         "Complete \"Repository\"",
         "Complete \"Commit to it\"",
@@ -54,7 +55,7 @@
         "Ahora inicia el tutorial ejecutando <code>git-it</code>",
         "Puedes modificar el tamaño de las ventanas en c9.io arrastrándolas por el borde.",
         "Asegúrate de que siempre te encuentres en el directorio \"workspace\" de tu proyecto. Puedes regresar a este directorio cuando quieras usando el comando: <code>cd ~/workspace</code>.",
-        "Puedes ver el código fuente de este módulo de Node School en GitHub visitando <a href='https://github.com/jlord/git-it'>https://github.com/jlord/git-it</a>.",
+        "Puedes ver el código fuente de este módulo de Node School en GitHub visitando <a href='https://github.com/jlord/git-it' target='_blank'>https://github.com/jlord/git-it</a>.",
         "Completa \"Get Git\"",
         "Completa \"Repository\"",
         "Completa \"Commit to it\"",