Add Mac client mode and simplify local proxy UI

entrypoint.client.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+PORT="${PORT:-3456}"
+PROXY_PORT="${PROXY_PORT:-8080}"
+DATA_DIR="${DATA_DIR:-/var/lib/vpn-proxy}"
+SING_BOX_CONFIG="${SING_BOX_CONFIG:-/etc/sing-box/config.json}"
+SING_BOX_CACHE="${SING_BOX_CACHE:-/var/lib/sing-box/cache.db}"
+
+log() {
+  printf '[client-entrypoint] %s\n' "$*"
+}
+
+mkdir -p "$DATA_DIR" "$(dirname "$SING_BOX_CONFIG")" "$(dirname "$SING_BOX_CACHE")"
+
+export APP_MODE=client
+export PORT PROXY_PORT DATA_DIR SING_BOX_CONFIG SING_BOX_CACHE
+export PROXY_BIND_IP="${PROXY_BIND_IP:-0.0.0.0}"
+
+log "starting VPN proxy client UI on :${PORT}, local proxy on :${PROXY_PORT}"
+exec node /app/src/server/index.js