Document project templates and link to it

The link pointed to the wrong page, this is corrected by both writing
the documentation and linking to that instead.

(internal)
Reference: https://gitlab.slack.com/archives/C0NFPSFA8/p1502791719000238

app/controllers/projects_controller.rb

@@ -28,7 +28,7 @@ class ProjectsController < Projects::ApplicationController
   end
 
   def create
-    @project = ::Projects::CreateService.new(current_user, project_params.merge(template_name: params[:template_name])).execute
+    @project = ::Projects::CreateService.new(current_user, project_params).execute
 
     if @project.saved?
       cookies[:issue_board_welcome_hidden] = { path: project_path(@project), value: nil, expires: Time.at(0) }

app/views/projects/new.html.haml

@@ -25,7 +25,7 @@
               .form-group
                 = f.label :template_project, class: 'label-light' do
                   Create from template
-                  = link_to icon('question-circle'), help_page_path("public_access/public_access"), aria: { label: "What’s included in a template?" }, title: "What’s included in a template?", class: 'has-tooltip', data: { placement: 'top'}
+                  = link_to icon('question-circle'), help_page_path("gitlab-basics/create-project"), target: '_blank', aria: { label: "What’s included in a template?" }, title: "What’s included in a template?", class: 'has-tooltip', data: { placement: 'top'}
                 %div
                   = render 'project_templates', f: f
           .second-column

doc/gitlab-basics/create-project.md

@@ -29,5 +29,12 @@
 
 1. Click **Create project**.
 
+## From a template
+
+To kickstart your development GitLab projects can be started from a template.
+For example, one of the templates included is Ruby on Rails. When filling out the 
+form for new projects, click the 'Ruby on Rails' button. During project creation,
+this will import a Ruby on Rails template with GitLab CI preconfigured.
+
 [import it]: ../workflow/importing/README.md
 [reserved]:  ../user/reserved_names.md