Reference the web editor docs in GitLab basics "Add a file"

doc/gitlab-basics/add-file.md

 # How to add a file
 
-You can create a file in your [shell](command-line-commands.md) or in GitLab.
-
-To create a file in GitLab, sign in to GitLab.
-
-Select a project on the right side of your screen:
-
-![Select a project](img/select_project.png)
-
-It's a good idea to [create a branch](create-branch.md), but it's not necessary.
-
-Go to the directory where you'd like to add the file and click on the "+" sign next to the name of the project and directory:
-
-![Create a file](img/create_file.png)
-
-Name your file (you can't add spaces, so you can use hyphens or underscores). Don't forget to include the markup language you'd like to use :
-
-![File name](img/file_name.png)
-
-Add all the information that you'd like to include in your file:
-
-![Add information](img/white_space.png)
-
-Add a commit message based on what you just added and then click on "commit changes":
-
-![Commit changes](img/commit_changes.png)
+You can create a file in your [terminal](command-line-commands.md) and push
+to GitLab or you can use the
+[web interface](../user/project/repository/web_editor.md#create-a-file).