How to add proxy_idps to production.json

production.json

{
  "env": "production",
  "bind_to": {
    "host": "127.0.0.1"
  },
  "use_minified_resources": true,
  "public_static_url": "https://static.login.persona.org",
  "database": {
    "driver": "mysql",
    "user": "browserid",
    "name": "browserid",
    "create_schema": true
  },
  "statsd": {
    "enabled": true
  },
  "kpi_backend_sample_rate": 0.0,
  "bcrypt_work_factor": 12,
  "max_compute_processes": null,
  "max_compute_duration": 10,
  "disable_primary_support": false,
  "enable_code_version": false,
  "default_lang": "en",
  "supported_languages": [
    "en"
  ],
  "debug_lang": "it-CH",
  "express_log_format": "default_bid",
  "email_to_console": false,
  
  "verifier": { "bind_to": { "port": 62800 } },
  "verifier_url": "http://127.0.0.1:62800/verify",
  "keysigner": { "bind_to": { "port": 62600 } },
  "keysigner_url": "http://127.0.0.1:62600",
  "dbwriter": { "bind_to": { "port": 62900 } },
  "dbwriter_url": "http://127.0.0.1:62900",
  "browserid": { "bind_to": { "port": 62700 } },
  "browserid_url": "http://127.0.0.1:62700",
  "static": { "bind_to": { "port": 63400 } },
  "static_url": "http://127.0.0.1:63400",
  "router": { "bind_to": { "port": 63300 } },

  "enable_development_menu": false,
  "measure_dom_loading": false,
  "proxy_idps": {
    "yahoo.com": "yahoo.login.anosrep.org"
  }
}