Merge pull request 'Add stage 1 support' (#910) from dboreham/stage1-support into main

Run webapp test suite

Success

Set up job4s
Clone project repository2s
Install Python for ARM on Linux0s
Install Python cases other than ARM on Linux18s
Print Python version0s
Install shiv6s
Generate build version file0s
Build local shiv package40s
Install wget11s
Run webapp tests3m34s
Notify Vulcanize Slack on CI failure0s
Notify DeepStack Slack on CI failure1s
Complete job5s