Issue #3069987 by daniel.bosen, mtodor: Update documentation

* Link to centralized documentation

* Keep file in sync with thunder/thunder-project

README.md

@@ -2,35 +2,11 @@
 
 This project template should provide a kickstart for managing your site dependencies with [Composer](https://getcomposer.org/).
 
-If you want to know how to use it as replacement for
-[Drush Make](https://github.com/drush-ops/drush/blob/8.x/docs/make.md) visit
-the [Documentation on drupal.org](https://www.drupal.org/node/2471553).
-
 ## Usage
 
-First you need to install [Composer](https://getcomposer.org/doc/00-intro.md#installation-linux-unix-osx) and [Git](https://git-scm.com).
-
-> Note: The instructions below refer to the [global composer installation](https://getcomposer.org/doc/00-intro.md#globally).
-You might need to replace `composer` with `php composer.phar` (or similar) 
-for your setup.
+See our [install documentation](https://thunder.github.io/thunder-documentation/quick-install) on how to use Thunder project.
 
-After that you can create the project:
-
-```
-composer create-project burdamagazinorg/thunder-project thunder
-```
-
-With `composer require ...` you can download new dependencies to your 
-installation.
-
-```
-cd thunder
-composer require drupal/devel:1.*
-```
-
-The `composer create-project` command passes ownership of all files to the 
-project that is created. You should create a new git repository, and commit 
-all files not excluded by the .gitignore file.
+We also have documentation on [extending](https://thunder.github.io/thunder-documentation/extending) and [updating](https://thunder.github.io/thunder-documentation/updating) Thunder sites. 
 
 ## What does the template do?
 
@@ -47,15 +23,6 @@ When installing the given `composer.json` some tasks are taken care of:
 * Latest version of drush is installed locally for use at `bin/drush`.
 * Latest version of DrupalConsole is installed locally for use at `bin/drupal`.
 
-## Installing Thunder
-
-Create project will install Thunder into the docroot directory. You can now install Thunder as you would with any Drupal 8 site. See: [Drupal installation guide](https://www.drupal.org/node/1839310).
-
-## Updating Thunder
-
-To update Thunder, Drupal or any module to the newest version, constrained by the specified version in `composer.json`, execute `composer update`. This command will check every dependency for a new version, downloads it and updates the `composer.lock` accordingly.
-After that you can run `drush updb` in the docroot folder to update the database of your site.
-
 ### File update
 
 This project will attempt to keep all of your Thunder and drupal core files up-to-date; the 
@@ -67,11 +34,11 @@ new release of Drupal core.
 
 Follow the steps below to update your thunder files.
 
-1. Run `composer update burdamagazinorg/thunder`
+1. Run `composer update`
 1. Run `git diff` to determine if any of the scaffolding files have changed. 
    Review the files for any changes and restore any customizations to 
   `.htaccess` or `robots.txt`.
-1. Commit everything all together in a single commit, so `web` will remain in
+1. Commit everything all together in a single commit, so `docroot` will remain in
    sync with the `core` when checking out branches or running `git bisect`.
 1. In the event that there are non-trivial conflicts in step 2, you may wish 
    to perform these steps on a branch, and use `git merge` to combine the 
@@ -125,7 +92,7 @@ achieve that by registering `@drupal-scaffold` as post-install and post-update c
     ]
 },
 ```
-### How can I prevent downloading modules from thunder, that I do not need?
+### How can I prevent downloading modules from Thunder, that I do not need?
 
 To prevent downloading a module, that Thunder provides but that you do not need, add a replace block to your composer.json: