{
  "_comment": [
    "webui4frpc startup config. Every field is optional; the effective",
    "precedence is: command-line flag > this file > built-in default.",
    "",
    "Password handling (pick ONE, do not put a literal password here):",
    "  \"password\": \"file:/etc/webui4frpc/secret/password\"   first line of a 0640 root:webui4frpc file",
    "  \"password\": \"${W4F_PASSWORD}\"                        from the environment (unset => refuses to start)",
    "",
    "Unknown keys are a hard error, so a typo cannot silently fall back to the",
    "built-in default credentials. The file may be absent (pure-flag mode)."
  ],
  "addr": "0.0.0.0:7500",
  "user": "admin",
  "password": "file:/etc/webui4frpc/secret/password",
  "workdir": "/var/lib/webui4frpc",

  "_optional": [
    "bin     - initial frpc binary path, seeded into settings on first start",
    "frpc    - fallback worker frpc path when settings has none",
    "peers   - cluster peer host:port list (same as repeating -peer)",
    "join_key- cluster admission key = sponsor node's nodeKey (or ${W4F_JOIN_KEY})"
  ],
  "frpc": "",
  "peers": [],
  "join_key": ""
}