Rework `rsmon-worker install` so one host can run several isolated
workers and so the installer consumes the full worker env-var set.
- main.go now loads .env before dispatching management commands, so
install/deploy read the same environment as the runtime.
- New --name flag installs a co-located worker as rsmon-worker-<name>
with its own binary (/usr/local/bin/rsmon-worker-<name>), config
(/etc/rsmon-worker-<name>), data dir (/var/lib/rsmon-worker-<name>),
and systemd unit. Named instances require an explicit WORKER_PORT.
- Configuration is resolved flags > --env-file > process env/.env
(godotenv) > defaults; the resolved set is written as a stable,
systemd-safe 0600 env file.
- WORKER_LOGIN/WORKER_PASSWORD default to a generated admin password
(printed once) when both are unset; XOR is rejected.
- The generated unit is now hardened (After=docker.service, CAP_NET_RAW,
ProtectSystem=full, ReadWritePaths=data dir) and parameterized by
instance; the Docker unit is namespaced by instance too.
- install creates the data + config directories and prints a summary
(unit, binary, env file, data dir, console URL, generated password).
- New flags: --name, --host, --port, --login, --password/--password-file.
- Tests: resolvePaths, validateInstanceName, resolveInstallEnv
precedence/XOR/port-required, renderEnvFile, validateEnvValue, plus
named-instance unit assertions. End-to-end verified by installing and
removing a throwaway --name instance.
- docs/install.md documents the tool, config sources/precedence,
single- and multi-instance flows, the exact actions performed, the
generated unit, options, and uninstall.
