modified nginx default conf file

+ added openssl in nginx site conf file
+ reorganized readme

srcs/requirements/nginx/conf/nginx.conf

@@ -46,7 +46,7 @@ http {																		# section for http server directives
 	# Gzip Settings
 	##
 
-	gzip on;																# enable gzipping of responses. gzip is an algorithm that compress the data
+	gzip off;																# enable gzipping of responses. gzip is an algorithm that compress the data (disabled for security reasons : https://bugs.debian.org/773332)
 
 	# gzip_vary on;
 	# gzip_proxied any;