Improved markdownlint (#3918)

* Improved markdownlint
* Relaxed rules slighlty
* `npm run markdownlint` for automatic tests
* `npm run markdownlint_fix` for automatic syntax fixing
* Applied the fixes on all our Markdown files

1 files changed, 4 insertions, 2 deletions

diff --git a/docs/en/admins/10_ServerConfig.md b/docs/en/admins/10_ServerConfig.md
index 5286023f8..6c5823a2d 100644
--- a/docs/en/admins/10_ServerConfig.md
+++ b/docs/en/admins/10_ServerConfig.md
@@ -1,9 +1,10 @@
 # Apache/Nginx Configuration Files
 
 ## Apache configuration
+
 This is an example Apache virtual hosts configuration file. It covers HTTP and HTTPS configuration.
 
-```
+```apache
 <VirtualHost *:80>
 	DocumentRoot /var/www/html/
 
@@ -62,7 +63,8 @@ This is an example Apache virtual hosts configuration file. It covers HTTP and H
 This is an example nginx configuration file. It covers HTTP, HTTPS, and php-fpm configuration.
 
 You can find simpler config file but they may be incompatible with FreshRSS API.
-```
+
+```nginx
 server {
 	listen 80;
 	listen 443 ssl;