add build in Docker

[karu2003]

simple project build in Docker. no garbage in the system.

[github-actions]

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[karu2003]

I have read the CLA Document and I hereby sign the CLA

[albfan]

Whatever the process to get into this changes you should rework into atomic meaningful changes.

Some of the probably might be cherry-picked (like config the jobs in make, but not really related with this PR

[albfan]

There's a general config for this.

If you want to do that as a build on docker, why someone will not want to build firmware?

force config on a docker build is wrong

[albfan]

squash into atomic change

[albfan]

use meaningful commit messages.

If you want to use the cpus available say so on commit

[albfan]

squash

[albfan]

squash into an atomic change

[karu2003]

Whatever the process to get into this changes you should rework into atomic meaningful changes.

Some of the probably might be cherry-picked (like config the jobs in make, but not really related with this PR

you can close PR. it's been a long time. i use docker for myself.

[karu2003]

you can close PR. it's been a long time. i use docker for myself.

[albfan]

You should close yourself