Switch to ESM

.eslintrc.cjs

@@ -0,0 +1,63 @@
+module.exports = {
+  env: {
+    commonjs: true,
+    es2022: true,
+    node: true,
+    jest: true,
+    'jest/globals': true
+  },
+  extends: [
+    'standard',
+    'prettier',
+    'plugin:import/recommended',
+    'plugin:jest-formatting/recommended',
+    'plugin:n/recommended',
+    'plugin:promise/recommended'
+  ],
+  overrides: [
+    {
+      files: ['**/*.cjs'],
+      parserOptions: {
+        sourceType: 'commonjs'
+      }
+    },
+    {
+      files: ['**/*.test.js'],
+      plugins: ['jest'],
+      extends: ['plugin:jest/recommended', 'plugin:jest-formatting/recommended']
+    }
+  ],
+  parserOptions: {
+    ecmaVersion: 'latest',
+    sourceType: 'module'
+  },
+  plugins: ['import', 'jest', 'jest-formatting', 'n', 'promise', 'prettier'],
+  rules: {
+    'prettier/prettier': [
+      'error',
+      {
+        endOfLine: 'auto'
+      }
+    ],
+    'no-console': 'error',
+
+    // Check for mandatory file extensions
+    // https://nodejs.org/api/esm.html#mandatory-file-extensions
+    'import/extensions': ['error', 'always', { ignorePackages: true }],
+
+    // Skip rules handled by TypeScript compiler
+    'import/default': 'off',
+    'import/namespace': 'off',
+    'n/no-extraneous-require': 'off',
+    'n/no-extraneous-import': 'off',
+    'n/no-missing-require': 'off',
+    'n/no-missing-import': 'off'
+  },
+  settings: {
+    'import/resolver': {
+      node: true,
+      typescript: true
+    }
+  },
+  ignorePatterns: ['.server', '.public', 'src/__fixtures__', 'coverage']
+}

.npmignore

@@ -0,0 +1,4 @@
+*.config.*
+*.test.*
+__fixtures__
+test-helpers

.prettierrc.js

@@ -1,4 +1,4 @@
-module.exports = {
+export default {
   tabWidth: 2,
   semi: false,
   singleQuote: true,

Dockerfile

@@ -38,4 +38,4 @@ ARG PORT
 ENV PORT ${PORT}
 EXPOSE ${PORT}
 
-CMD [ "node", "./.server" ]
+CMD [ "node", "." ]

babel.config.cjs

@@ -0,0 +1,31 @@
+const { NODE_ENV } = process.env
+
+module.exports = {
+  presets: [
+    [
+      '@babel/preset-env',
+      {
+        modules: NODE_ENV === 'test' ? 'auto' : false,
+        targets: {
+          node: '20'
+        }
+      }
+    ]
+  ],
+  plugins: [
+    [
+      'module-resolver',
+      {
+        root: ['./'],
+        alias: {
+          '~': '.'
+        }
+      }
+    ]
+  ],
+  env: {
+    test: {
+      plugins: ['babel-plugin-transform-import-meta']
+    }
+  }
+}

jest-mongodb-config.js

@@ -1,4 +1,4 @@
-module.exports = {
+export default {
   mongodbMemoryServerOptions: {
     binary: {
       skipMD5: true

jest.config.js

@@ -1,4 +1,4 @@
-module.exports = {
+export default {
   rootDir: '.',
   verbose: true,
   resetModules: true,