[SDK-2677] Support node-oidc-provider

[stevehobbsdev]

Description

This PR adds support for using node-oidc-provider in the playground as an alternative for hitting real Auth0. The motivation is that, in another PR that's coming, we can add support for running E2E tests against this provider instead of Auth0. Additionally, we can run the auth server on the same origin as the application being tested, and avoid cross-origin issues when using Cypress.

To make this work, a number of things had to be changed:

• Now uses rollup-plugin-dev to serve the playground instead of rollup-plugin-serve, as the former has better extensibility points and proxy support (should we need it)
• Integrates node-oidc-provider into the application by providing the appropriate mount points to the underlying Koa app that is created by rollup-plugin-dev. This means that the auth server can run on the same origin as the app
• SDK can now accept a domain with an http or https scheme, and will not try to automatically prefix with https. This allows us to use http://localhost:3000 as the domain when using the OIDC provider
• Since node-oidc-provider only supports form data on the token endpoint (as per the spec), this PR also adds a new config option useFormData to the SDK where the developer can opt-in to using form data instead of JSON. We'd like to move to using this as the default later, as it's faster (no CORS pre-flight check)
• Upgrades to Cypress 7.2.0
• Adds tests
• Adds a new switch to the playground where form data can be turned on

Summary

• Swap rollup-plugin-serve for rollup-plugin-dev
• Add ability to use form post to get tokens
• Add logout support
• Fix domain URL
• Add switch to the playground to enable form data
• Prevent useCookiesForTransactions from being sent to token endpoint
• Add tests for domain config
• Added tests for sending form data when appropriate
• Added form data tests for token worker
• Upgrade to Cypress 7.2.0 and fix tests
• Add E2E tests for form post data

[lgtm-com]

This pull request introduces 1 alert when merging 66a12fe into 30e674c - view on LGTM.com

new alerts:

• 1 for Hard-coded credentials

[stevehobbsdev]

Marked as draft as I want to do a little more testing.

[lgtm-com]

This pull request introduces 1 alert when merging 5227c26 into 30e674c - view on LGTM.com

new alerts:

• 1 for Hard-coded credentials

[frederikprijck]

Looks good, one small question.

[lgtm-com]

This pull request introduces 1 alert when merging 6740c33 into 30e674c - view on LGTM.com

new alerts:

• 1 for Hard-coded credentials

[lgtm-com]

This pull request introduces 1 alert when merging 15fb94c into 30e674c - view on LGTM.com

new alerts:

• 1 for Hard-coded credentials