# Zymonic Gateway systemd service

This directory contains a sample `systemd` unit for running the gateway as
`zymonic-gateway.service`.

The gateway reads one JSON configuration file. By default, it looks for this
file in the current working directory:

```text
zymonic-gateway.json
```

Pass another file with:

```sh
dotnet ZymonicGateway.dll --gateway-config /path/to/zymonic-gateway.json
```

After loading the JSON file, the gateway overlays:

1. `ZYMONIC_GATEWAY_` environment variables
2. command-line arguments

For production installs, place the gateway configuration in:

```text
/etc/zymonic/zymonic-gateway.json
```

The service unit defaults `ZYMONIC_GATEWAY_CONFIG` to that path and passes it
with `--gateway-config`. It also uses `ConditionPathExists` for the same file so
`systemctl start zymonic-gateway` fails clearly when the deployed configuration
has not been created.

The sample unit assumes the published gateway lives at:

```text
/opt/zymonic/ZymonicGateway/ZymonicGateway.dll
```

Adjust `WorkingDirectory`, `ExecStart`, `User`, `Group`, and writable paths to
match the target host before installing it under `/etc/systemd/system/`.

Local development is unchanged: from `ZymonicApp/ZymonicGateway`, run:

```sh
dotnet run
```