Documentation for Synology NAS hosting. (#26)

* Add Synology hosting documentation.

* Correct SYnology documentation numbering.

* Correct wrongly formated link.

* Correct image placement.

* Correct angle brackets.

* Fix list elements.

* Clean MariaDB10 image (red dots were appearing on it...).

* Add missing WS-DataFolderRights.png image.

* Make sure neither xdebug nor display_error are selected.

_install/index.md

@@ -30,6 +30,7 @@ things you should know.
 * [MAMP]({% link _install/mamp.md %})
 * [Microsoft/IIS]({% link _install/iis.md %})
 * [OVH]({% link _install/ovh.md %})
+* [Synology]({% link _install/synology.md %})
 * [XAMPP]({% link _install/xampp.md %})
 
 ## Third-party installers

_install/synology.md

@@ -0,0 +1,130 @@
+---
+layout: documentation
+title:  Synology NAS hosting
+date:   2021-01-10
+order:  99
+---
+
+This procedure if for Synology NAS running DiskStation Manager (DSM) version 6.X.
+
+# Pre-requisites
+
+## Packages Installation
+
+Open the DiskStation Manager interface. Use the Package Center to install the following packages (note they may already be installed):
+* Web Station
+* MariaDB 10
+* phpMyAdmin (only required for initial set-up of the database, may be removed once Webtrees is running).
+
+## Webstation configuration
+
+1. In DSM, open "Web Station".
+2. Click on "General Setting" and check which PHP profile is being used ("Default PHP 7.4" in the below example):
+
+   ![Click on General Settings, check PHP profile.](../assets/img/synology/WS-GeneralSettings.png)
+
+3. Click on "PHP Settings" then select the the PHP profile used by Web Station:
+
+   ![Click on PHP Settings, select default PHP profile.](../assets/img/synology/WS-PHPSettings.png)
+
+4. Edit the selected PHP profile, make sure
+   - all extensions are activated in the Extensions list.
+   - neither "Enable Xdebug" nor "Enable display_errors to display PHP error messages" are selected.
+
+   ![Edit the default PHP profile, activate all extensions.](../assets/img/synology/WS-PHPProfileSettings.png)
+
+5. Click "OK".
+## MySQL/MariaDB configuration
+
+### Confirm MySQL/MariaDB server port
+
+6. In DSM, open "MariaDB 10".
+7. Check/confirm which port MariaDB is running on. Default is 3307.
+
+   ![Check the MariaDB 10 port. Default is 3307 on Synology NAS.](../assets/img/synology/WS-MariaDBSettings.png)
+
+### MariaDB user and database configuration
+
+8. In DSM, open "phpMyAdmin", and log-in using a profile allowed to create databases and profiles/users (e.g. "root").
+9. Click on "User account", then click on "Add user account":
+
+   ![Add a user account.](../assets/img/synology/WS-MariaUserAccounts.png)
+
+10. Choose the database sessings:
+- "User name" will be both the user name and the database name. **Note it in order not to forget it!**
+- "Host name" must be set to "localhost" for safety reasons.
+- Generating a complex/random password is recommended. **Note it in order not to forget it!**
+- Tick "Create database with same name and grant all privileges."
+
+   ![Recommended user settings.](../assets/img/synology/WS-MariaUserAccountsSettings.png)
+
+11. Click "Go" at the bottom right to generate both the user and its associated database.
+
+# Webtrees installation
+
+## Moving the files to your NAS
+
+12. Synology NAS come with PHP >= 7.1, so you will have to download [webtrees-{{ site.latest_version }}.zip][DOWNLOAD].
+13. Unpack this file on your computer.  You should have a folder called `webtrees`.
+14. On you NAS, open "File Station", navigate to your `web` folder.
+15. Create a `webtrees` folder (or any other name) inside your .
+16. Drag and drop the content the `webtrees` folder on your computer in the `webtrees` folder created at step 4 ("File Station" supports multiple files and folders drag and drop).
+
+   ![Drag and drop Webtrees files into File Station.](../assets/img/synology/WS-MoveWebtreesFiles.png)
+
+## Setting main folder rights
+
+17. Still in "File Station", right click on the `webtrees` (or any other name) folder you created at step 4, then click on "Properties". Click on the "Permission" tab.
+18. Click on "Create", then fill the "Permission Editor" window (this will allow Webtrees to automatically update):
+- User of group: http
+- Inherit from: \<None\>
+- Type: Allow
+- Apply to: All
+- Leave "Administration" unticked.
+- Do not select anything in "Administration" rights.
+- Select everything for "Read" rights.
+- Select everything but "Delete" for "Write" rights.
+
+   ![Main folder rights.](../assets/img/synology/WS-MainFolderRights.png)
+
+- Once done click "OK".
+19.  Select "Apply to this folder, sub-folders and files", then click "OK".
+
+   ![Main folder properties.](../assets/img/synology/WS-MainFolderProperties.png)
+
+## Setting main folder rights
+
+20. Still in "File Station", right click on the `data` sub-folder of your webtrees install folder, then click on "Properties". Click on the "Permission" tab.
+21. Click on "Create", then fill the "Permission Editor" window (this will allow Webtrees to automatically update):
+- User of group: http
+- Inherit from: <None>
+- Type: Allow
+- Apply to: All
+- Leave "Administration" unticked.
+- Do not select anything in "Administration" rights.
+- Select everything for "Read" rights.
+- Select everything for "Write" rights.
+
+   ![Main folder rights.](../assets/img/synology/WS-DataFolderRights.png)
+
+- Once done click "OK".
+22. Select "Apply to this folder, sub-folders and files", then click "OK".
+
+   ![Main folder properties.](../assets/img/synology/WS-MainFolderProperties.png)
+
+## Configuring Webtrees
+
+23. Run the webtrees configuration wizard.
+24. Once at the "Database connection" step, enter the following settings:
+- Server name: 127.0.0.1
+- Port number: 3307
+- Database user account: the one you noted at step 3.3 of this documentation.
+- Database password: the one you noted at step 3.3 of this documentation.
+- Database name: identical to the database user account.
+- Table prefix: leave "wt_"
+
+   ![Main folder properties.](../assets/img/synology/WS-MainFolderProperties.png)
+
+25. Last step is to create the user account that will be used as your main Webtrees account.
+
+Any question, post it on the [Webtrees Forum](https://www.webtrees.net/index.php/en/forum).