docs: rename about.md to _index.md after Hugo upgrade

Use the official way of including markdown content into index.html

CONTRIBUTING.md

@@ -383,7 +383,7 @@ alphabetical order of full name of remote (eg `drive` is ordered as
     * update them with `make backenddocs` - revert any changes in other backends
   * `docs/content/overview.md` - overview docs
   * `docs/content/docs.md` - list of remotes in config section
-  * `docs/content/about.md` - front page of rclone.org
+  * `docs/content/_index.md` - front page of rclone.org
   * `docs/layouts/chrome/navbar.html` - add it to the website navigation
   * `bin/make_manual.py` - add the page to the `docs` constant
 

bin/make_manual.py

@@ -13,7 +13,7 @@ outfile = "MANUAL.md"
 
 # Order to add docs segments to make outfile
 docs = [
-    "about.md",
+    "_index.md",
     "install.md",
     "docs.md",
     "remote_setup.md",

docs/content/_index.md

@@ -3,7 +3,6 @@ title: "Rclone"
 description: "rclone syncs files to and from Google Drive, S3, Swift, Cloudfiles, Dropbox, Google Cloud Storage and Amazon Drive."
 type: page
 date: "2017-09-25"
-groups: ["about"]
 ---
 
 # Rclone - rsync for cloud storage

docs/layouts/index.html

@@ -4,11 +4,8 @@
 <div class="container">
     <div class="row">
         <div class="col-md-10">
-          {{ range $key, $value := .Site.Taxonomies.groups.about.Pages }}
-          {{ $value.Content }}
-          {{ end }}
+          {{ .Content }}
         </div>
-
         <!-- Sidebar -->
         <div class="col-md-2">
         {{ template "chrome/menu.html" . }}