Added the variable to the .env.dev.sample file

.env.dev.sample

@@ -22,3 +22,12 @@ PORT=8080
 DOLI_URL=http://${HOST}:${PORT}
 LOCALE=fr_FR.UTF-8
 TZ="Europe/Paris"
+
+# MAIL CONFIG
+MAIL_SMTP_HOST=mail.gandi.net
+MAIL_SMTP_PORT=465
+MAIL_SENDMODE=smtps
+MAIL_SMTP_USER=tetrix@tetras-libre.fr
+MAIL_SMTP_PASSWORD=<lemotdepasse de la boite tetrix>
+MAIL_MAIN_FROM=dolibarr.<monclient>@tetras-libre.fr
+