Add ErrorBoundary component with tests and LoadingSpinner

.env.example

@@ -1,11 +1,2 @@
-# not required for local development
-GITHUB_TOKEN=YOUR_GITHUB_TOKEN
-# Steps to create:
-# 1. Go to Settings -> Developer settings -> Personal access tokens -> Tokens (classic) -> Generate new token -> Generate new token (classic)
-# 2. Permissions: repo, user
-# 3. Generate token
-# 4. Copy token
-# 5. Paste token in .env.local 
-
-# required for tagline generation
-GEMINI_API_KEY="api key" # your gemini api key
+GITHUB_TOKEN=your_github_token_here
+GEMINI_API_KEY=your_gemini_api_key_here

jest.config.js

@@ -0,0 +1,28 @@
+const nextJest = require('next/jest');
+
+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 customJestConfig = {
+  setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
+  testEnvironment: 'jest-environment-jsdom',
+  moduleNameMapper: {
+    '^@/(.*)$': '<rootDir>/src/$1',
+  },
+  testMatch: [
+    '<rootDir>/src/__tests__/**/*.test.(js|jsx|ts|tsx)',
+  ],
+  collectCoverage: true,
+  collectCoverageFrom: [
+    'src/**/*.{js,jsx,ts,tsx}',
+    '!src/**/*.d.ts',
+    '!src/**/*.stories.{js,jsx,ts,tsx}',
+    '!src/app/layout.js',
+    '!src/app/page.jsx',
+  ],
+};
+
+module.exports = createJestConfig(customJestConfig);

jest.setup.js

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