https://github.com/woolo/signalforfriends/raw/master/Signal-website-release-latest.apk
https://signal.org/android/apk/
It would be really helpful if the run.sh script could be executed regularly to keep the binary apk file up-to-date.
git clone https://github.com/YOUR_GITHUB_NAME/signalforfriends.git
cd signalforfriends
chmod u+x run.sh
Later, one can either run the run.sh by:
./run.sh
Or simply setup a service to run the run.sh routinely.