* move service files from contrib/package/arch/ to /contrib/systemd/
* add simpler default copyparty.conf that puts users in jail
* remove warning about .conf files in ~/.config/copyparty/
* update PKGBUILD with changes
* add links to configuration examples in index.md
* fix link to the example config
* update README.md arch instructions
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Co-authored-by: icxes <icxes@dev.null@need.moe>
Co-authored-by: ed <s@ocv.me>