Add option in oidc to hit the optional userinfo endpoint

Some oauth providers return "thin tokens" which won't include all of the
claims requested. This simply adds an option which will make the oidc
connector use the userinfo endpoint to fetch all the claims.

server: add metrics for CORS handlers.

fix typo

Round out logging interface with functions for all levels

docs: update bitbucket permission requirements

Print appropriate error

gitlab: support for group whitelist, add tests

cmd/dex/serve.go: log static client name instead of ID

Signed-off-by: Yann Soubeyrand <yann.soubeyrand@gmx.fr>

Update Docker build/image

- Update build container to golang:1.12.4-alpine
- Update dex image to alpine:3.9
- Run dex as non-root user
Signed-off-by: Stephen Augustus <saugustus@vmware.com>

Add option to OIDC connecter to override email_verified to true

Fix typo.

Add logger interface and stop relying on Logrus directly

Fix typo

production users: add Banzai Cloud

Update modules for go 1.11.4+

Go 1.11.3 changed how checksums are created in some cases, which caused
failures building via modules. (ref golang/go#29278)

Update the checksums for the failing modules.

To catch this is the future, a modules build was added to the build matrix. I
also noted that we were pinning the `.0` patchlevel of each go version which
wouldn't have picked this up, updated it to build with the latest patch
release.

Use github login as the id

server: update health check endpoint to query storage periodically

Instead of querying the storage every time a health check is performed
query it periodically and save the result.