feat(gowa): compose GOWA + UI untuk podman/docker

- docker-compose.gowa.yml (image v9.8.0, volume storages/statics, webhook + basic auth)
- .env.gowa.example
- README: cara jalankan + setting OPEN-ISP
- versi 0.5.7

package.json

@@ -1,6 +1,6 @@
 {
   "name": "open-isp",
-  "version": "0.5.6",
+  "version": "0.5.7",
   "description": "OPEN-ISP \u2014 sistem billing & manajemen ISP open-source (PWA pelanggan, multi-OLT, RADIUS, WhatsApp, QRIS)",
   "main": "app-customer.js",
   "scripts": {