feat(mail): #132 unify env variables and send mails with smtp

utils/mail.go

@@ -0,0 +1,19 @@
+package utils
+
+import (
+	"log/slog"
+	"net/smtp"
+)
+
+func SendWelcomeMail(to string) {
+
+	auth := smtp.PlainAuth("", SmtpUser, SmtpPass, SmtpHost)
+
+	msg := "From: " + SmtpFromName + " <" + SmtpFromMail + ">\nTo: " + to + "\nSubject: Welcome to me-fit\n\nWelcome to me-fit!"
+
+	err := smtp.SendMail(SmtpHost+":"+SmtpPort, auth, SmtpFromMail, []string{to}, []byte(msg))
+	if err != nil {
+		slog.Error("Could not send mail: " + err.Error())
+	}
+
+}