* 'master' of github.com:spotify/backstage: (30 commits)
fix(techdocs-core): use the content of the readme as long description for the pypi package (#2578)
chore: add contrib to CONTRIBUTING.md (#2585)
Fix typo (#2584)
backend-common: default config env to development
v0.1.1-alpha.23
TechDocs: Inject CSS transformer and initial backstage style integration for reader (#2560)
bug(gql): use import to import the graphql module
Rename file
[blog] Announce CNCF Sandbox (#2568)
document cleaning - tutorial quickstarts (#2520)
Simplify codecov flag names
chore(scaffolder-backend): typo in visibility
Kubernetes plugins boilerplate (#2559)
CHANGELOG: add entry for SessionApi refactor
Upload package specific code coverage to codecov
Add codecov flags for core and core-api packages
TechDocs: Enable allowVulnerableTags in sanitize-html (#2554)
chore: trust the Boolean :)
docs: regenerate api reference docs
core: refactor SessionStateApi to SessionApi with sign-in/out
...
This is the first commit of the rollbar plugin. It is fully functional
but will require some additional features to make it more usable and
feature complete. It currently includes a backend wraps the rollbar REST
API and provides data for the frontend plugin.