Repository Index: Generate an index.yaml in ./docx/helm-repo/index.yaml
to allow for browsertrix to be a helm repository.
docs: rename docs.browsertrix.cloud -> docs.browsertrix.com
docs: update deployment doc to mention helm repo as preferred way to
install
docs build action: generate repository index in GH action
publish action: update auto-generated message to mention installing from
the repo.
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Co-authored-by: Tessa Walsh <tessa@bitarchivist.net>
