[BUG] Installation workflow described in README.md only works on unix based operating systems

[riedde]

Describe the problem
Installation described in the README.md only works for unix based operating systems.

• L. 81
  • The context "dot" after the git clone command causes problems on windows. On Mac it also works without it.
  • Proposal:
    • If your operating system is Microsoft Windows, you need to use
    • git clone https://github.com/Edirom/Edirom-Online.git && set EDITION_XAR=https://github.com/Edirom/EditionExample/releases/download/v0.1.1/EditionExample-0.1.1.xar && docker compose up
• L. 100 & l. 125
  • Proposal: "If your operating system is Microsoft Windows, you need to rename export to set"