ci(jest): Setup jest for frontend app

Refs: #1

.eslintrc.json

@@ -1,3 +1,7 @@
 {
-  "extends": "next/core-web-vitals"
+  "extends": "next/core-web-vitals",
+  "env": {
+    "jest/globals": true
+  },
+  "plugins": ["jest"]
 }

jest.config.ts

@@ -0,0 +1,17 @@
+import type { Config } from 'jest'
+import nextJest from 'next/jest.js'
+
+const createJestConfig = nextJest({
+    // Provide the path to your Next.js app to load next.config.js and .env files in your test environment
+    dir: './',
+})
+
+// Add any custom config to be passed to Jest
+const config: Config = {
+    coverageProvider: 'v8',
+    testEnvironment: 'jsdom',
+    setupFilesAfterEnv: ['<rootDir>/jest.setup.ts'],
+}
+
+// createJestConfig is exported this way to ensure that next/jest can load the Next.js config which is async
+export default createJestConfig(config)

jest.setup.ts

@@ -0,0 +1 @@
+import '@testing-library/jest-dom'