e2e: make playwright BASE_URL-driven for remote runs

playwright.config.ts

@@ -1,16 +1,31 @@
 import { defineConfig } from "@playwright/test";
 
+const baseURL = process.env.BASE_URL ?? "http://localhost:8080";
+const startLocalServer = !process.env.BASE_URL;
+
 export default defineConfig({
   testDir: "tests/e2e",
   timeout: 30000,
   use: {
-    baseURL: "http://localhost:8080",
+    baseURL,
     headless: true,
+    httpCredentials:
+      process.env.BASIC_AUTH_USER && process.env.BASIC_AUTH_PASS
+        ? {
+            username: process.env.BASIC_AUTH_USER,
+            password: process.env.BASIC_AUTH_PASS,
+          }
+        : undefined,
   },
-  webServer: {
-    command: "pnpm dev",
-    url: "http://localhost:8080",
-    reuseExistingServer: true,
-    timeout: 30000,
-  },
+  reporter: [["html", { open: "never" }], ["list"]],
+  ...(startLocalServer
+    ? {
+        webServer: {
+          command: "pnpm dev",
+          url: "http://localhost:8080",
+          reuseExistingServer: true,
+          timeout: 30000,
+        },
+      }
+    : {}),
 });