Latest Release

Major update of the whole RaspiBolt guide! :rocket:
The guide is now available at https://raspibolt.org/
Core guide structure
The "core" guide is defined as a basic set of guides on how to set up the Raspberry Pi and install a core set of Bitcoin and Lightning tools. It is structured as follows:

Intro: what is the project and why should you care?
Backstory: original motivation
Raspberry Pi: set up the system
Bitcoin: run Bitcoin Core, Electrum server, and a blockchain explorer
Lightning: run LND including web-based node management

The Bonus Section is still being updated to the new setup.
Main changes of the RaspiBolt version 3
Raspberry Pi

Raspberry Pi OS Lite 64-bit
Only standard Debian commands are used for wider compatibility
RaspiOS is flashed directly to an external drive, no need for a microSD card (this lowers setup complexity tremendously)
Individual service users for all applications
Data directory at /data/, by default on the same drive, but anything can be mounted
NGINX using dedicated reverse proxy include files for all of the exposed ports (Electrum, web apps)
Tor is installed from Debian repositories
SSH over Tor

Bitcoin

Bitcoin Core
Usage of rpcauth.py to create hashed RPC credentials, enabling cookie authentication
runs without wallet (prerequisite for group-based access to cookie, set via sysparms)
Electrs 
updated to v0.9.2
compilation uses Rust repository installation
Elects PGP git tag verification
BTC RPC Explorer 
updated to v0.3.2
exposed via SSL/TLS at https://raspibolt.local:4000
Basic Authentication for web interface

Lightning

LND
updated to v0.14.0
automated password unlock via password file (todo: offer more secure options)
Ride The Lightning
new addition to RaspiBolt: v0.11.2
exposed via SSL/TLS at https://raspibolt.local:4001

Other changes

new dark-mode with raspberry pink glowing 80's color theme
added OpenGraph tags for social media previews
renamed files to a more atomic naming scheme