Docs improve

[stokito]

This changes would safe me time. Easy to build with make build and run a demo.
Docs made more clear.

[tg123]

thanks for the pr

1 makefile is good, but have to keep it up to date. current build is via gorelease, any future update may make makefile stale.
2 key can be generated via --server-key-generate-mode=notexist, no need to put a fake key in the repo
3 maybe using docker-compose to start a demo if doc is not clear enough

[stokito]

The makefile is really just same steps as described in the readme.
It's main goal is to build plugins but then debug in Goland.
The goreleaser is an additional tool to install and learn which I don\t need for now.

I just made changes that might simplify learning for me

[tg123]

there is a devcontainer.json for vscode, i do not have goland not sure if makefile is required
but i am open to add makefile, as building plugins need too many args to go build

integrate makefile with https://github.com/tg123/sshpiper/blob/master/Dockerfile#L12?

[stokito]

Well, the purpose of the Makefile is just to show a simplest commands to build it locally. No need to integrate to with Docker. It can be just as an option.
If you feel not comfortable with it then you can skip the last commit

[tg123]

i mean call make inside dockerfile to ensure makefile is up to date

[stokito]

Not sure, but rather no. They are used for different purposes.