perkeep/config/dev-blobserver-config.json

{ "_for-emacs": "-*- mode: js2;-*-",
  "baseURL": ["_env", "http://localhost:${CAMLI_PORT}"],
  "password": ["_env", "${CAMLI_PASSWORD}"],

  "TLSCertFile": ["_env", "${CAMLI_TLS_CRT_FILE}"],
  "TLSKeyFile": ["_env", "${CAMLI_TLS_KEY_FILE}"],

  "prefixes": {
    "/": {
         "handler": "filesystem",
         "handlerArgs": {
            "path": ["_env", "${CAMLI_ROOT}"]
      }
    }
  }
}