Add jest, i18n and react-query (#175)

Add jest, i18n and react-query

frontend/jest.config.js

@@ -0,0 +1,26 @@
+const merge = require('lodash/merge');
+const nextJest = require('next/jest')
+const awsuiPreset = require('@awsui/jest-preset/jest-preset');
+
+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 = {
+  // Add more setup options before each test is run
+  // setupFilesAfterEnv: ['<rootDir>/jest.setup.js'],
+  // if using TypeScript with a baseUrl set to the root directory then you need the below for alias' to work
+  moduleDirectories: ['node_modules', '<rootDir>/'],
+  testEnvironment: 'jest-environment-jsdom',
+}
+
+async function mergePolarisPreset() {
+  const nextConfig = await createJestConfig(customJestConfig)()
+  const mergedConfig = merge({}, nextConfig, awsuiPreset)
+
+  return mergedConfig
+}
+
+module.exports = mergePolarisPreset

frontend/locales/en/strings.json

@@ -0,0 +1,7 @@
+{
+  "global": {
+    "menu": {
+      "home": "Home"
+    }
+  }
+}