Integrate Safe Growsing APIs to avoid serving scam websites

[Lucy Linder]

See if we can add Safe Browsing APIs to the pipe to avoid having scammers using rickroller. This is especially problematic because platforms such as AWS can block us if they detect something weird.

• Python Integration: https://pypi.org/project/pysafebrowsing/
• Proxy Server: https://github.com/google/safebrowsing