docs(deploy) : add deployment guide and MCP connection tutorial

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

deploy/nginx/lesstime.conf

@@ -1,5 +1,6 @@
 server {
   listen 80;
+  listen [::]:80;
   server_name project.malio-dev.fr;
 
   root /var/www/lesstime/frontend/.output/public;
@@ -37,7 +38,6 @@ server {
         fastcgi_param SCRIPT_FILENAME /var/www/lesstime/public/index.php;
         fastcgi_param DOCUMENT_ROOT /var/www/lesstime/public;
         fastcgi_pass unix:/run/php/php8.4-fpm.sock;
-        internal;
     }
 
   location ~ \.php$ {