Add docs for site creation

README.md

 # user-documentation
 
-Documentation for site administrators, published as Discourse articles on https://drupal-community.web.cern.ch/docs
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+Documentation for site administrators, published as Discourse articles on https://drupal-community.web.cern.ch/docs.
\ No newline at end of file

docs/create_site.md

+<div data-theme-toc="true"> </div>
+
+# Creating a drupal site
+
+You can create a drupal site from scratch by following a few simple steps. A drupal site is connected with an OpenShift project, which can have multiple drupal sites. Note that a project (and all drupal sites in it) has a single owner and SSO registration.
+
+## From the OpenShift console
+
+#### 1. Go to the [OpenShift console](https://drupal.cern.ch) page
+
+Check on the left side menu that the **Administrator** option is selected (and **not** Developer).
+
+#### 2. Create a new OpenShift project by clicking `Create Project` and fill in the information
+
+![Screenshot](images/openshift_console-create_project.png)
+
+---
+
+* **Name**: Enter the name of your project.
+* **Display Name** [optional]: Enter the display name of the project.
+* **Description**: Enter a description of your site.
+
+![Screenshot](images/openshift_console-create_project_fill.png)
+
+---
+
+#### 3. Click on `Installed Operators` on the left side menu
+
+Make sure that you are in the correct `Project`. At first you will see a message "No Operators Found". Please wait a couple of minutes until the "DrupalSite Operator" appears as shown in the screenshot below. 
+
+![Screenshot](images/openshift_console-installed_operators.png)
+
+---
+
+#### 4. Click on `Create Drupal website` on the latest DrupalSite Operator
+
+![Screenshot](images/openshift_console-installed_operators_create_drupal_website.png)
+
+---
+
+#### 5. Click on `Create DrupalSite`
+
+![Screenshot](images/openshift_console-create_drupalsite.png)
+
+---
+
+#### 6. Fill in the information to create a Drupalsite
+
+* **Name**: Enter the name of the site.
+* **Labels**: Ignore this field.
+* **Publish**: If set to true, it makes the site accessible to the internet.
+* **Disk Size**: Enter the maximum size of the site's files directory.
+* **Site URL** [optional]: Enter the desired site URL. Must look like [mysite.web.cern.ch]() and not be used already by another site.
+* **Web DAV Password** [optional]: Enter the desired password for WebDAV file access. A default is auto-generated if a value isn't given.
+
+![Screenshot](images/openshift_console-create_drupalsite_fill.png)
+
+---
+
+#### 7. Click on `Environment` to expand the options panel with the default settings
+
+Environment allows you to define alternative instances of the website with different content, that can be used to test/pilot site building, configuration, or updates.
+
+* **Environment name**: Many branches of the website can exist in the same project for development and testing purposes. Set `production` for a public website, or any other value for branches.
+* **Quality of Service class**: Request appropriate default configurations and resources for the requirements of your website.
+* **Database Class**: Select the kind of database that the website needs.
+* **Extra configs repo** [optional]: Provide additional settings to your website in a git repository.
+* **Site Builder**: Ignore this field.
+* **Init Clone From** [optional]: InitCloneFrom initializes this environment by cloning the specified DrupalSite (usually production), instead of installing an empty CERN-themed website.
+
+![Screenshot](images/openshift_console-create_drupalsite_environment_fill.png)
+
+---
+
+#### 8. Click on `Version` to expand the options panel with the default settings
+
+Version refers to the version and release of the CERN Drupal Distribution that will be deployed to serve this website. Changing this value triggers the website's update process.
+
+* **Name**: Select the desired version of the branch of CERN Drupal Distribution.
+* **Release Spec**: Specify the desired release version. The available releases are:
+    - `RELEASE-2021.06.16T08-09-55Z`
+    - `RELEASE-2021.06.07T21-48-18Z`
+    - `RELEASE-2021.06.01T15-27-02Z`
+
+![Screenshot](images/openshift_console-create_drupalsite_version_fill.png)
+
+---
+
+#### 8. Click on `Create` button
+
+![Screenshot](images/openshift_console-create_button.png)
+
+---
+
+Your drupal site is ready.
+
+Keep in mind that related sites (production, development, test) can be grouped under a single project starting from [Step 3](#3-click-on-installed-operators-on-the-left-side-menu).
+