Though I personally take a different route, probably the easiest way is to create a new project on the website, leave the option "Initialize repository with a README" or similar enabled, and then do a git clone to get that repository onto the local machine, and then start working in this new directory, pushing changes up to the server as desired.

You know, haukex, I might read your posts ten times and still get something from them. I finally cottoned on to the whole git clone deal, and I'm able to move forward:

$  git clone https://github.com/haukex/webperl.wiki.git wiki
Cloning into 'wiki'...
remote: Enumerating objects: 64, done.
remote: Total 64 (delta 0), reused 0 (delta 0), pack-reused 64
Unpacking objects: 100% (64/64), done.
$ ls
1.example.config.txt  1.txt     2.txt     4.getopt.pl  5.git.sh   wiki
1.git.sh              2.git.sh  3.git.sh  5.getopt.pl  README.md
$ cd wiki
$ ls
Building-WebPerl.md  _Footer.md  Perl6.md                    Using-Web
+Perl.md
FAQ.md               Home.md     Post-your-Examples-Here.md
$ cat Using-WebPerl.md 
These are **supplemental** notes on using WebPerl.
Please see the main documentation at **<https://webperl.zero-g.net/usi
+ng.html>**.

- Nothing here yet.
$ pwd
/home/pi/Documents/curate/perlmonks/trans/trans/trans/wiki
$ ls
Building-WebPerl.md  _Footer.md  Perl6.md                    Using-Web
+Perl.md
FAQ.md               Home.md     Post-your-Examples-Here.md
$ git clone --branch gh-pages https://github.com/haukex/webperl.git pa
+ges
Cloning into 'pages'...
remote: Enumerating objects: 1106, done.
remote: Total 1106 (delta 0), reused 0 (delta 0), pack-reused 1106
Receiving objects: 100% (1106/1106), 6.15 MiB | 2.48 MiB/s, done.
Resolving deltas: 100% (711/711), done.
$ ls
Building-WebPerl.md  _Footer.md  pages     Post-your-Examples-Here.md
FAQ.md               Home.md     Perl6.md  Using-WebPerl.md
$ cd pages/
$ ls
building.md  favicon.ico                      legal.md  regex.html
CNAME        HD_WebPerl_GPW_2019_Slides.pdf   _misc     using.md
_config.yml  HD_WebPerl_Riga_2019_Slides.pdf  notes.md  webperl.png
democode     index.md                         perl6.md
$
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Q1) How do I clone the rpi repo that I visit so much and now can't find?

I hadn't been in a position to follow webperl main page when you rolled it out. I remember that I had some crummy hosting arrangement at the time that didn't allow me to have sudo privileges, so I couldn't replicate much of any of it. Well, now is the dead of winter, and I have my perl feet under me now. I'm confident that if I typed:

plackup webperl.psgi
[download]

, your software would snap to attention and be ready for contact. So I have executed the cpanfile that was:

# $ cpanm --installdeps .

requires 'Cpanel::JSON::XS';
requires 'Plack';
requires 'Plack::Middleware::CrossOrigin';
requires 'Plack::Middleware::Auth::Digest';
[download]

Q2) Is Plack the solution for my upload question?

I'm concerned that I see the date of 2009 at stackoverflow thread on psgi and advent.plackperl, but I'm hoping that means that it is well-seasoned rather than obsolete. I am encouraged to see the name Miyagawa on it. One comment from these sources:

I'm new in PSGI too, but zilion things now are much easier as before in my apache/mod_perl era. try write some apps with it and will find than Plack is like the first sex - now you didn't understand that you could live without it. ps: If was here something like "Perl Oscar", will sure nominating MyiagavaSan. :)

That's kind of the way I feel about:

cpanm --installdeps .
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Again, thanks for your writeup....

Gruss aus Amiland,