[FEATURE] Adds Keycloak support

[Lissy93]

Category: Feature

Overview
Adds support for secure authentication using Keycloak, plus docs
Also refactors the auth attribute, which later down the line will involve breaking changes

Issue Number #33

New Vars
Under appConfig.auth.keycloak

Field	Type	Required	Description
serverUrl	string	Required	The URL (or URL/ IP + Port) where your keycloak server is running
realm	string	Required	The name of the realm (must already be created) that you want to use
clientId	string	Required	The Client ID of the client you created for use with Dashy

Screenshot N/A

Code Quality Checklist (Please complete)

• All changes are backwards compatible
• All lint checks and tests are passing
• There are no (new) build warnings or errors
• (If a new config option is added) Attribute is outlined in the schema and documented
• (If a new dependency is added) Package is essential, and has been checked out for security or performance
• Bumps version, if new feature added

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[github-actions]

yarn.lock changes

Click to toggle table visibility

Name	Status	Previous	Current
js-sha256		-	0.9.0
keycloak-js		-	15.0.2

[viezly]

Changes preview:

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