Docker install instructions don't work (Frontend).

[jackmerrill]

I tried what is on the README and the Wiki for Docker Deployment, and nothing has worked.

Everything deploys, but the frontend has Golang errors.
Error:

goroutine 1 [running]:,
panic(0x9c6c80, 0xc420012080),
	/usr/local/go/src/runtime/panic.go:500 +0x1a1,
github.com/miekg/dns.ClientConfigFromFile(0xa6d99b, 0x10, 0x0, 0x0, 0x0),
	/home/caddy/go/src/github.com/miekg/dns/clientconfig.go:86 +0x8cb,
github.com/xenolf/lego/acme.getNameservers(0xa6d99b, 0x10, 0xd63ce0, 0x2, 0x2, 0x0, 0x3, 0xc420033f90),
	/home/caddy/go/src/github.com/xenolf/lego/acme/dns_challenge.go:40 +0x4d,
github.com/xenolf/lego/acme.init(),
	/home/caddy/go/src/github.com/xenolf/lego/acme/dns_challenge.go:33 +0x12b,
github.com/mholt/caddy/caddy/caddymain.init(),
	/tmp/custombuild_3624_375719435/src/github.com/mholt/caddy/caddy/caddymain/run.go:237 +0x5b,
main.init(),
	/tmp/custombuild_3624_375719435/src/github.com/mholt/caddy/caddy/main.go:15 +0x2e,
panic: runtime error: slice bounds out of range

I haven't modified any files, and only modified the host ports on the frontend so the container would start (80/443 already taken).

What do I do, if I can fix this?

Docker on Ubuntu 20.04, Portainer for web frontend.