Fix Safari "Can't establish a secure connection to the server" with self-signed certificates (Lando, Vagrant, Docker etc)

bash.sh

# Stop the HTTP storage manager (since it has an in-memory cache of the HSTS hosts).
killall nsurlstoraged 

# Delete the HSTS cache file.
rm -f ~/Library/Cookies/HSTS.plist 
# This may not work if Terminal is not configured for "Full Disk Access", so instead:
# Open Finder, Shift+Apple+G, paste in ~/Library/Cookies/ and manually delete HSTS.plist  

# Start up nsurlstoraged again
launchctl start /System/Library/LaunchAgents/com.apple.nsurlstoraged.plist

## Otherwise
# Open Keychain Access
# Go to All Items
# Filter by some of the sites URLs
# Delete the related secure certificates