Downloads archive of neovim nightly and builds it using a Debian arm64 docker container
This works on x86_64 by using qemu emulation
./run.sh launches a docker container and starts the build.sh script inside it
When the build is done you should see a message like:
CPack: - package: /build/src/neovim-nightly/build/nvim-linux64.deb generated.
This corresponds to src/neovim-nightly/build/nvim-linux64.deb outside the container. Copy this file to your raspberry pi (or other aarch64 device) and install it using dpkg -i nvim-linux64.deb