Migrate gateway from local -i ini file to the unified confs configuration
service, following the same two-layer pattern as Python services (dnfs/db/static):
- Add confs/configs/gateway.ini with all existing settings plus new
[Downstream] section for db/captcha/smtp host:port (previously hardcoded).
- Conf.hpp: add fromString() to parse ini from text (confs response),
env()/env_int() static helpers for environment variables, public default
constructor, and empty-filename guard in file constructor.
- DbC.hpp: add init(host, port) static method and static _host/_port members,
replacing hardcoded "127.0.0.1":8005. Defaults preserved for backward compat.
- main.cpp:
* Rewrite config loading: bootstrap CONFS_HOST/CONFS_PORT from env
(default 127.0.0.1:8010), fetch gateway.ini via pymsg from confs
(retry_on_refused=true), parse with ConfIni::fromString().
* -i flag is now optional; when provided, reads local ini (dev/debug mode).
* Add downstream host/port globals (_DB_HOST/_DB_PORT, _CAPTCHA_HOST/_CAPTCHA_PORT,
_SMTP_HOST/_SMTP_PORT, _CONFS_HOST/_CONFS_PORT), populated from [Downstream].
* Environment variable overrides (highest priority): LISTEN_ADDR/LISTEN_PORT,
DB_HOST/DB_PORT, CAPTCHA_HOST/CAPTCHA_PORT, SMTP_HOST/SMTP_PORT.
* Config integrity validation: required fields (Server.address/port,
Proxy.default, Downstream.db_host/db_port) cause startup failure if missing.
* Initialize DbC::init() and logs().set_endpoint() after config load.
* Replace all hardcoded "127.0.0.1":8005/8008/8009 in captcha/smtp/db calls
with configurable globals.
* Add downstream service info to startup log output.
* Fix: -v/--version flag now actually prints version and exits.
* Bump version to 0.7.0.
- _run.sh: remove -i example.ini default; now starts without args (confs mode),
passes "$@" through for optional -i override.
- Update README with new config loading docs, Downstream config section,
updated directory structure, and v0.7.0 changelog.
qing