1. This PR passes `BTCPAY_HOST` to LibrePatron's container. In future versions, this will allow me to automatically generate the BTCPay pairing URL for LibrePatron users. (This was a feature originally suggested by @NicolasDorier.)
2. This updates LibrePatron to v0.6.78. This new version updates the subscription scheduler backend with database persistence.
LibrePatron had a bug where it did not properly handle IPNs on certain lightning payments, due to differences in the way BTCPay sends on-chain vs lightning IPNs. This update fixes that bug. Please push as soon as you can so that LibrePatron users can resume lightning payments.
Jeff Vandrew Jr
nicolas.dorier