fix(server): fix baseUrl option for serve command

Author: timmywil

bin/command.js

@@ -190,10 +190,11 @@ yargs( process.argv.slice( 2 ) )
 					"Pass multiple by repeating the option."
 			} );
 		},
-		handler: async( { baseUrl, configFile, quiet, ...argv } ) => {
+		handler: async( { configFile, quiet, ...argv } ) => {
 			console.log( "Starting server..." );
 			const config = await readYAML( configFile );
 			const middleware = await parseMiddleware( config, argv );
+			const baseUrl = config.baseUrl ?? argv.baseUrl ?? "/test/";
 
 			/**
 			 * Run a simple server for loading tests in a browser.

run.js

@@ -35,14 +35,6 @@ export async function run( {
 	runId,
 	verbose
 } ) {
-	if ( !baseUrl ) {
-		throw new Error( "No baseUrl specified." );
-	}
-
-	// Ensure baseUrl ends with a slash
-	if ( !rendsWithSlash.test( baseUrl ) ) {
-		baseUrl += "/";
-	}
 	if ( !browserNames.length ) {
 		browserNames = [ "chrome" ];
 	}
@@ -52,6 +44,11 @@ export async function run( {
 		);
 	}
 
+	// Ensure baseUrl ends with a slash
+	if ( !rendsWithSlash.test( baseUrl ) ) {
+		baseUrl += "/";
+	}
+
 	if ( verbose ) {
 		console.log( browserstack ? "Running in BrowserStack." : "Running locally." );
 	}