This template is an improvement of Phoenix4815/pandoc_letter, with a couple of ideas from selfawaresoup/latex-templates.
It does unterstand additional settings invoice and frombank now, to be able to write invoices.
There are two examples: a regular letter (in file examples/brief1.md) and an invoice letter (in file examples/brief1re.md, re as in Rechnung), as well as the resulting PDF files.
You will find out about even more settings by studying the Usage section in Phoenix4815/pandoc_letter.
Also, in the directory batch there are some scripts you can use on Windows on daily basis. Execute set_path.bat to be able to execute other scripts, and simply run mdltr file.md for regular letters and mdtblltr file.md for invoice letters or any letters with tables (the Markdown table syntax as in examples/brief1re.md).