feat: Added action + refactored playwright config url

Author: lamATnginx

.github/workflows/playwright.yml

@@ -0,0 +1,22 @@
+name: Testing for visual regression on old theme
+
+# Run the workflow when code is pushed or when a pull request is created
+on:
+    push:
+      branches:
+        - '**'
+    pull_request:
+      branches:
+        - main
+
+jobs:
+    playwright:
+        name: Run Playwright
+        runs-on: ubuntu-latest
+        steps: 
+          # Checkout the repository so the workflow has access to the code
+          - name: Checkout code
+            uses: actions/checkout@v3
+          - name: Run tests
+            run: |
+                make tests

tests/playwright.config.js

@@ -1,5 +1,7 @@
 import { defineConfig, devices } from '@playwright/test';
 
+const BASE_URL = 'http://127.0.0.1';
+const PORT = 1313;
 export default defineConfig({
   testDir: './src',
   fullyParallel: true,
@@ -8,7 +10,7 @@ export default defineConfig({
   snapshotPathTemplate: '{testDir}/__screenshots__/{testFilePath}/{arg}{ext}',
   reporter: [['html', { outputFolder: './playwright-report' }]],
   use: {
-    baseURL: 'http://127.0.0.1:1314',
+    baseURL: `${BASE_URL}:${PORT}`,
     screenshots: 'only-on-failure',
     video: 'retain-on-failure',
     trace: 'on-first-retry',
@@ -32,9 +34,8 @@ export default defineConfig({
     },
   ],
   webServer: {
-    command:
-      'cd ../exampleSite && hugo mod get && hugo --gc -e production && hugo serve --port 1314',
-    url: 'http://127.0.0.1:1314',
+    command: `cd ../exampleSite && hugo mod get && hugo --gc -e production && hugo serve --port ${PORT}`,
+    url: `${BASE_URL}:${PORT}`,
     stdout: 'ignore',
   },
   expect: {