Add .eslintrc.js for functions and common packages

common/.eslintrc.js

@@ -0,0 +1,18 @@
+module.exports = {
+  extends: ['eslint:recommended'],
+  env: {
+    browser: true,
+    node: true,
+  },
+  overrides: [
+    {
+      files: ['**/*.ts'],
+      plugins: ['@typescript-eslint'],
+      parser: '@typescript-eslint/parser',
+    },
+  ],
+  rules: {
+    'no-unused-vars': 'off',
+    'no-constant-condition': ['error', { checkLoops: false }],
+  },
+}

functions/.eslintrc.js

@@ -0,0 +1,21 @@
+module.exports = {
+  extends: ['eslint:recommended'],
+  ignorePatterns: ['lib'],
+  env: {
+    node: true,
+  },
+  overrides: [
+    {
+      files: ['**/*.ts'],
+      plugins: ['@typescript-eslint'],
+      parser: '@typescript-eslint/parser',
+      parserOptions: {
+        project: ['./tsconfig.json'],
+      },
+    },
+  ],
+  rules: {
+    'no-unused-vars': 'off',
+    'no-constant-condition': ['error', { checkLoops: false }],
+  },
+}