grim/convey

Replace deprecated ioutil usage

5 months ago, Elliott Sales de Andrade
f2b1178f3266
Replace deprecated ioutil usage

It was deprecated in Go 1.16, but `go.mod` wants 1.17 already.

Testing Done:
Ran `go build .`

Reviewed at https://reviews.imfreedom.org/r/2868/
# Convey
[ ![Issues](https://img.shields.io/badge/Issues-YouTrack-ee3b8b.svg) ](https://issues.imfreedom.org/issues/CONVEY?u=1)
Convey is a pipeline for running containers and protecting the host as much as
possible. It accomplishes this goal by creating a volume and making it
available to each item in the pipeline.
## Documentation
Full documentation is available at
[docs.imfreedom.org/convey](https://docs.imfreedom.org/convey/).
## License
GPLv3+
## Status
This project has been used for awhile in production environment, but every
environment is different. So, if you find issues, or are looking for ways to
help, please check out our
[issue tracker](https://issues.imfreedom.org/issues/CONVEY?u=1).
## Building
```
$ go build
```