67a464d097 Mention problems with hardened kernel and NUCs in README (Jonas Nick)
7771a4c931 Refer to systemd man pages for hardening options (Jonas Nick)
a5e10a82d8 Simplify clightning preStart (Jonas Nick)
Pull request description:
CC @cypherpunk2140
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Tree-SHA512: aa726f29e499cc268b21cac8cd07617be591cfdaa89dd0495cb979ebd3e49cc01164af25924c554429a1d35d14167dea276f7d61877452b69f027143cc3eee97