cannot believe how hard it is to get Linuxbrew working on Synology

Linuxbrew doesn't really like being installed on a Synology NAS, you have to force the issue in a few important ways.

Create a /usr/bin/ldd shim so the Homebrew installer can figure out it's compatible with the system glibc: https://community.synology.com/enu/forum/1/post/153781
```
#!/bin/bash
[[ $(/usr/lib/libc.so.6) =~ version\ ([0-9]\.[0-9]+) ]] && echo "ldd ${BASH_REMATCH[1]}"
```
made with @nex3's syntax highlighter
Mount /volume1/homes to /home:
sudo mkdir /home && sudo mount -o bind "/volume1/homes" /home
Install Homebrew using the normal curl-based instructions on https://brew.sh
Download the latest amd64 static curl Linux binary to ~/bin/curl:
https://github.com/moparisthebest/static-curl/releases/latest
Override curl detection in $(brew --prefix)/Library/Homebrew/brew.sh):
In setup_curl function, replace the literal HOMEBREW_CURL="curl" with HOMEBREW_CURL="${HOME}/bin/curl
Install a compiler from Homebrew:
brew install gcc
Force Linuxbrew to find its own copy of gcc:
ln -s $(which gcc-12) /home/linuxbrew/.linuxbrew/bin/gcc
Install curl from Homebrew:
brew install curl

Now you have a working base setup which can install things. You can also revert the curl detection. Good luck!

Jessica