feat: add socks5 proxy compose setup

socks5/.env.sample

@@ -0,0 +1,19 @@
+# Copy this file to .env and adjust the values:
+#     cp .env.sample .env
+
+PROXY_PORT=1080
+
+# Client credentials (leave empty to run without authentication)
+PROXY_USER=socks5user
+PROXY_PASSWORD=change-me-strong-password
+
+# true = require authentication, false = allow anonymous connections
+REQUIRE_AUTH=true
+
+# Optional: comma-separated client IPs allowed to connect (empty = allow all)
+ALLOWED_IPS=
+
+# Optional: regex of destination FQDNs allowed through the proxy (empty = allow all)
+ALLOWED_DEST_FQDN=
+
+TZ=Asia/Shanghai