Support nonce and acr with OIDC + other improvements and tests (#883)

* Introduces new configuration variables for OIDC:
  - GRIST_OIDC_IDP_ENABLED_PROTECTIONS
  - GRIST_OIDC_IDP_ACR_VALUES
  - GRIST_OIDC_IDP_EXTRA_CLIENT_METADATA
* Implements all supported protections in oidc/Protections.ts
* Includes a better error page for failed OIDC logins
* Includes some other improvements, e.g. to logging, to OIDC
* Adds a large unit test for OIDCConfig
* Adds support for SERVER_NODE_OPTIONS for running tests
* Adds to documentation/develop.md info about GREP_TESTS, VERBOSE, and SERVER_NODE_OPTIONS.

test/nbrowser/homeUtil.ts

@@ -381,7 +381,7 @@ export class HomeUtil {
   /**
    * Waits for browser to navigate to a Grist login page.
    */
-   public async checkGristLoginPage(waitMs: number = 2000) {
+  public async checkGristLoginPage(waitMs: number = 2000) {
     await this.driver.wait(this.isOnGristLoginPage.bind(this), waitMs);
   }
 

test/nbrowser/testServer.ts

@@ -152,7 +152,10 @@ export class TestServerMerged extends EventEmitter implements IMochaServer {
       delete env.DOC_WORKER_COUNT;
     }
     this._server = spawn('node', [cmd], {
-      env,
+      env: {
+        ...env,
+        ...(process.env.SERVER_NODE_OPTIONS ? {NODE_OPTIONS: process.env.SERVER_NODE_OPTIONS} : {})
+      },
       stdio: quiet ? 'ignore' : ['inherit', serverLog, serverLog],
     });
     this._exitPromise = exitPromise(this._server);