Add eslint config

.project.eslintrc.js

@@ -0,0 +1,47 @@
+const fs = require('fs');
+const path = require('path');
+
+const projectRootPath = fs.existsSync('./project')
+  ? fs.realpathSync('./project')
+  : fs.realpathSync('./../../../');
+const packageJson = require(path.join(projectRootPath, 'package.json'));
+const jsConfig = require(path.join(projectRootPath, 'jsconfig.json'))
+  .compilerOptions;
+
+const pathsConfig = jsConfig.paths;
+
+let voltoPath = path.join(projectRootPath, 'node_modules/@plone/volto');
+
+Object.keys(pathsConfig).forEach((pkg) => {
+  if (pkg === '@plone/volto') {
+    voltoPath = `./${jsConfig.baseUrl}/${pathsConfig[pkg][0]}`;
+  }
+});
+const AddonConfigurationRegistry = require(`${voltoPath}/addon-registry.js`);
+const reg = new AddonConfigurationRegistry(projectRootPath);
+
+// Extends ESlint configuration for adding the aliases to `src` directories in Volto addons
+const addonAliases = Object.keys(reg.packages).map((o) => [
+  o,
+  reg.packages[o].modulePath,
+]);
+
+module.exports = {
+  extends: `${projectRootPath}/node_modules/@plone/volto/.eslintrc`,
+  settings: {
+    'import/resolver': {
+      alias: {
+        map: [
+          ['@plone/volto', '@plone/volto/src'],
+          ...addonAliases,
+          ['@package', `${__dirname}/src`],
+          ['~', `${__dirname}/src`],
+        ],
+        extensions: ['.js', '.jsx', '.json'],
+      },
+      'babel-plugin-root-import': {
+        rootPathSuffix: 'src',
+      },
+    },
+  },
+};