Release 1.19.0

Relates to #407 (closed)

Not in the changelog:

d22149a33adacedf9501b9f9fef3d97761d7d6f6 (origin/master, origin/HEAD, master) Merge branch '365-add-metrics-for-disk-serving' into 'master'
193b911922d389ab2a8145d1fda190faecc13704 Merge branch '385-enable-second-set-of-linters' into 'master'
8b7f2d56ba6593376144c270a578d277ba2e7d7c Merge branch '400-disable-eslint' into 'master'
47c305524c15d8e556b515538e7b7d996c01abac Merge branch '385-add-golangci-yml' into 'master'
559311801a1e9114f8dee71faa388dcefab3dcbe Merge branch 'pages-update-goyaml' into 'master'
e190ec6bac7a52a67a472019b88c5224136526e9 Merge branch '394-fix-sast-scans' into 'master'
c73b70fda8f28fbc6fabebbee3255df40980cdca Merge branch 'add-security-release-process-docs' into 'master'
6d3a0ace6d73c41e7c2442e84b2cab6fe1ade22f Merge branch 'add-domain-source-config' into 'master' - NOT ADDING THIS SINCE FLAG IS NOT USED NOW
7fc40304d81069da9f9dc1f201714ae7a848f708 Merge branch 'revert-34cfb385' into 'master' - SECURITY FIXES DOCS
151ecc2704b7467488fab0a9b2c2410f75d438ff Merge branch 'min-go-1.13' into 'master' - DEVELOPER FACING