allow custom mail templates (#533)

internal/config/config.go

@@ -195,6 +195,7 @@ func defaultConfig() *Config {
 		From:           getEnvStr("WG_PORTAL_MAIL_FROM", "Wireguard Portal <noreply@wireguard.local>"),
 		LinkOnly:       getEnvBool("WG_PORTAL_MAIL_LINK_ONLY", false),
 		AllowPeerEmail: getEnvBool("WG_PORTAL_MAIL_ALLOW_PEER_EMAIL", false),
+		TemplatesPath:  getEnvStr("WG_PORTAL_MAIL_TEMPLATES_PATH", ""),
 	}
 
 	cfg.Webhook.Url = getEnvStr("WG_PORTAL_WEBHOOK_URL", "") // no webhook by default

internal/config/mail.go

@@ -43,4 +43,8 @@ type MailConfig struct {
 	LinkOnly bool `yaml:"link_only"`
 	// AllowPeerEmail specifies whether emails should be sent to peers which have no valid user account linked, but an email address is set as "user".
 	AllowPeerEmail bool `yaml:"allow_peer_email"`
+	// TemplatesPath is an optional base path on the filesystem that contains email templates (.gotpl and .gohtml).
+	// If the directory exists but is empty, the embedded default templates will be written there on startup.
+	// If templates are present in the directory, they override the embedded defaults.
+	TemplatesPath string `yaml:"templates_path"`
 }