Documentation: Update installation guide with permissions fix and cleanup instructions

Author: ywarnier

public/documentation/installation_guide.html

@@ -96,7 +96,15 @@ <h3>2.5. Installation wizard</h3>
     <h3>2.6. Sessions and Redis</h3>
     <a id="web-install-sessions" class="anchor"></a>
       In this beta version, there are known issues with sessions not getting updated fast enough, which can be solved (temporarily) by using a Redis server. Check the command line instructions for more about this. This is a temporary situation that we expect to fix before the stable release.
-
+   
+    <h3>2.7. Clean up</h3>h3>
+    <a id="web-cleanup" class="anchor"></a>
+    As recommended by the installer's last page, make sure you change permissions on the config/ dir and the .env file, and you delete the public/main/install/ folder.
+    <pre>
+        sudo chown -R root: config/ .env
+        sudo rm -r public/main/install/
+    </pre>
+    
   <h2>3. Command line installation</h2>
   <a id="cli-install" class="anchor"></a>
 
@@ -116,7 +124,7 @@ <h3>3.1. Software stack</h3>
 rm chamilo2.0.0-beta.1.tar.gz
 cd chamilo
 touch .env
-chown -R www-data: var .env
+chown -R www-data: var/ config/ .env
 mysql -u root -e "GRANT ALL PRIVILEGES ON chamilo.* TO chamilo@localhost IDENTIFIED BY '[choose a password here]'";
 mysql -u root -e "FLUSH PRIVILEGES;"
 mysql_secure_installation
@@ -179,7 +187,7 @@ <h3>3.3. Web server</h3>
 systemctl restart apache2</pre>
     <h3>3.4. Files permissions</h3>
     <a id="cli-install-permissions" class="anchor"></a>
-    Make sure the following files and folders are writeable by the web server. Set permissions to 0770 for example:
+    Make sure the following files and folders are writeable by the web server during the installation. Set permissions to 0770 or the owner to www-data, for example:
     <ul>
         <li>var/</li>
         <li>config/</li>
@@ -202,6 +210,14 @@ <h3>3.6. Installation wizard</h3>
     You should now be able to direct your browser to your URL (e.g. <em>[http://my.chamilo.local]</em>).<br>
     Chamilo will pick it up from there and offer the installation wizard to help guide you through the rest of the process.
 
+    <h3>3.7. Clean up</h3>h3>
+    <a id="cli-cleanup" class="anchor"></a>
+    As recommended by the installer's last page, make sure you change permissions on the config/ dir and the .env file, and you delete the public/main/install/ folder.
+    <pre>
+        sudo chown -R root: config/ .env
+        sudo rm -r public/main/install/
+    </pre>
+
   <h2>4. Command line upgrade from 1.11.*</h2>
   <a id="cli-upgrade" class="anchor"></a>
     <h3>4.1. Database</h3>