Update README based on go template from gluon
Utilize the `norwoodj/helm-docs` image from docker [(more info)](https://github.com/norwoodj/helm-docs) and the go template in gluon/docs to generate a new README for the authservice package. Follow instructions in the Gluon Document https://repo1.dso.mil/platform-one/big-bang/apps/library-charts/gluon/-/blob/master/docs/bb-package-readme.md .
AC:
- [ ] README Renders correctly
- [ ] Links are correct
- [ ] Information is correct
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