Update INSTALL.md

INSTALL.md

@@ -221,16 +221,18 @@ Next, create a new Apache virtual host configuration file to serve the Mercator
 
 Add the following lines:
 
-    <VirtualHost *:80>
+```xml
+<VirtualHost *:80>
     ServerName mercator.local
     ServerAdmin admin@example.com
     DocumentRoot /var/www/mercator/public
     <Directory /var/www/mercator>
-    AllowOverride All
+        AllowOverride All
     </Directory>
     ErrorLog ${APACHE_LOG_DIR}/error.log
     CustomLog ${APACHE_LOG_DIR}/access.log combined
-    </VirtualHost>
+</VirtualHost>
+```
 
 Save and close the file when you are done. Next, enable the Apache virtual host and the rewrite module with the following command:
 
@@ -257,10 +259,12 @@ Here is the configuration file for HTTPS
     SSLCertificateFile /etc/apache2/certs/certs/carto.XXXXX.crt
     SSLCertificateKeyFile /etc/apache2/certs/private/private.key
     SSLCertificateChainFile /etc/apache2/certs/certs/XXXXXCA.crt
-<Directory /var/www/mercator/public>
-AllowOverride All
-ErrorLog ${APACHE_LOG_DIR}/mercator_error.log
-CustomLog ${APACHE_LOG_DIR}/mercator_access.log combined
+    <Directory /var/www/mercator/public>
+        AllowOverride All
+    </Directory>
+    ErrorLog ${APACHE_LOG_DIR}/mercator_error.log
+    CustomLog ${APACHE_LOG_DIR}/mercator_access.log combined
+</VirtualHost>
 ```
 
 To force HTTPS redirection you have to set this parameter in .env