add CSP usage #152

Job	Run time
Codacy	5m 34s
Install	1m 58s
DevSkim	1m 50s
Prepack	4m 48s
Lighthouse (continuous integration)	3m 57s
Prepublish applications	3m 43s
Prepublish	6m 1s
Datadog sourcemaps	5m 31s
Sentry release	1m 41s
GitHub Pages	4m 18s
NPM	3m 12s
Cloudflare purge	54s
Wrangler deploy Authentication	4m 53s
GitHub Packages	2m 5s
Lighthouse (production)	3m 30s
	53m 55s

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