Improve fpm build in README for faster getting started

[jalvesz]

Hello,

I wanted to make a suggestion regarding the README instructions for building with fpm that might seem evident but I felt that could have avoided me some head scratching.

After forking and downloading the branch locally, the 'git checkout stdlib-fpm' command did not work directly, so I had to do the following which seems a bit more explicit:
source ./ci/fpm-deployment.sh
cd stdlib-fpm/

I would suggest adding these two lines to the readme but I wanted to ask if there is any reason not to?

(side question: would it be worth it to have a companion fpm-deployment.bat for windows?)

[jvdp1]

Sorry for the late reply.

After forking and downloading the branch locally, the 'git checkout stdlib-fpm' command did not work directly, so I had to do the following which seems a bit more explicit: source ./ci/fpm-deployment.sh cd stdlib-fpm/

I would suggest adding these two lines to the readme but I wanted to ask if there is any reason not to?

No, there is nor reason to not mention it. Ideally fpm should support fypp. But meanwhile I support your idea. Would you like to open a PR with your suggestion?

(side question: would it be worth it to have a companion fpm-deployment.bat for windows?)

I am not familiar with Windows. However, if it helpfuls, please propose such a script.