Update .eslintrc.js configuration

.eslintrc.js

@@ -0,0 +1,23 @@
+module.exports = {
+  root: true,
+  env: {
+    node: true,
+  },
+  extends: [
+    'plugin:vue/essential',
+    'eslint:recommended',
+  ],
+  parserOptions: {
+    parser: 'babel-eslint',
+  },
+  rules: {
+    'no-console': process.env.NODE_ENV === 'production' ? 'error' : 'off',
+    'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off',
+    'vue/no-parsing-error': ['error', { 'x-invalid-end-tag': false }],
+    'vue/no-unused-components': 'warn',
+    'vue/valid-template-root': 'error',
+    'vue/no-side-effects-in-computed-properties': 'error',
+    'vue/require-v-for-key': 'error',
+    'vue/no-unused-vars': 'error',
+  },
+};