It’s not as rare as you may think. I used to work at a weather service office located right near the end of one of the runways at IAD and it would happen a few times a day if the airport was busy and the winds were such that they were coming in from our side.
I would recommend prowlarr instead of jackett for indexer management, and pihole as at least an additional blocking service but in reality it’s really all you need for use at home. I’d also strongly encourage use of a VPN on your *arr download services. I use a separate box to run Plex and then have my *arrs all running on their own VM inside if it to provide separation and allow be to more easily segregate the network traffic (as someone that doesn’t really know docker that well it “just works” for me. Also probably worth looking at how to store your media on an external target, it’s easy to quickly accumulate 10s of TBs of media and trying to store that all on the server locally is asking for trouble. Better to set everything up on a NAS to start.
Honestly I don’t really know. I don’t think it has to be but you’ll need to research what kind of certs you’ll need for your purposes and what options exists for a CA.
My overall point was more that this isn’t really a “just setup Apache” web service, it’s a fair bit more involved since your looking for (I’m assuming) legally valid digital signatures which means they need to be secure, unique, identifiable, and adhere to non-repudiation. Services like DocuSign do all of that work already so unless you truly want open source because of passion or principles, this isn’t really a great area to try and roll your own without some experience and expertise.
Anything you use will need to generate secure certs for each user that signs which will need to be tied back to a root CA that is trusted by the clients device they are reading the signed documents on. Are you open to hosting all of the needed pieces to keep that working including buying the needed certs to chain trust?
Another plus one for Proton with your own domain.
Self hosting sounds good, but it’s fraught with mines that if you don’t know what you’re doing can take from “can’t send email because my domains been back listed” to “everything in my network is now sending spam to the entire world”. Sure, many folks self hosting sounds with no issues, but the price for configuring something wrong can be steep and IMO is just not worth the trouble and risks when there are good options for encrypted, privacy protecting email services for a reasonable price.