doc: Add some build instructions to README

4 jobs for build-instructions in 55 seconds (queued for 1 second)
Status Job ID Name Coverage
  Container
passed #7293417
aarch64
build-container-aarch64

00:00:15

passed #7293416
build-container-x86_64

00:00:10

 
  Build
passed #7293419
aarch64
build-aarch64

00:00:38

passed #7293418
build-x86_64

00:00:39