Rebuild vpn proxy around gateway mode

src/server/config.js

@@ -0,0 +1,21 @@
+import path from 'node:path';
+
+const dataDir = process.env.DATA_DIR || path.resolve('.vpn-proxy');
+
+export const settings = {
+  port: Number(process.env.PORT || 3456),
+  proxyPort: Number(process.env.PROXY_PORT || 8080),
+  tproxyPort: Number(process.env.TPROXY_PORT || 7895),
+  bindIp: process.env.PROXY_BIND_IP || '0.0.0.0',
+  dataDir,
+  distDir: process.env.DIST_DIR || '/app/dist',
+  configPath: process.env.SING_BOX_CONFIG || '/etc/sing-box/config.json',
+  cachePath: process.env.SING_BOX_CACHE || '/var/lib/sing-box/cache.db',
+  statePath: path.join(dataDir, 'state.json'),
+  customRulesPath: path.join(dataDir, 'custom-rules.json'),
+  subscriptionCachePath: path.join(dataDir, 'subscription-cache.json'),
+  hwidPath: path.join(dataDir, 'hwid'),
+  routingRuDirect: String(process.env.ROUTING_RU_DIRECT || 'true') !== 'false',
+  logLevel: process.env.LOG_LEVEL || 'info',
+  appName: 'VPN Proxy Gateway',
+};