whoops. typo. also add a systemd service file

beep.service

···
+[Unit]
+Description=beep server
+After=network.target
+
+[Service]
+ExecStart=/usr/local/bin/v run . config.real.maple
+Restart=always
+User=beep
+WorkingDirectory=/home/beep/beep
+
+[Install]
+WantedBy=multi-user.target

src/webapp/api.v

···
 	if app.config.hcaptcha.enabled {
 		token := ctx.form['h-captcha-response']
 		response := http.post('https://api.hcaptcha.com/siteverify', '{
-			"secret": "${app.config.hcaptcha.site_key}",
+			"secret": "${app.config.hcaptcha.secret}",
 			"remoteip": "${ctx.ip()}",
 			"response": "${token}"
 		}') or {