Fix "No url defined in config file" when using ESM

lib/env/config.js

@@ -20,6 +20,11 @@ function getConfigPath() {
   return path.join(process.cwd(), fileOptionValue);
 }
 
+function getModuleExports(module) {
+  // If ESM module format need to return default export
+  return module.default ? module.default : module;
+}
+
 module.exports = {
   DEFAULT_CONFIG_FILE_NAME,
 
@@ -63,11 +68,12 @@ module.exports = {
     }
     const configPath = getConfigPath();
     try {
-      return await Promise.resolve(moduleLoader.require(configPath));
+      const result = await moduleLoader.require(configPath);
+      return getModuleExports(result);
     } catch (e) {
       if (e.code === 'ERR_REQUIRE_ESM') {
         const loadedImport = await moduleLoader.import(url.pathToFileURL(configPath));
-        return loadedImport.default
+        return getModuleExports(loadedImport);
       }
       throw e;
     }

test/env/config.test.js

@@ -142,5 +142,35 @@ describe("config", () => {
       await config.read();
       expect(moduleLoader.import.called).to.equal(true);
     });
+
+    it("should handle ESM modules with default export", async () => {
+      const expectedConfig = {
+        mongodb: {
+          url: 'mongodb://localhost:27017',
+          databaseName: 'test'
+        }
+      };
+
+      moduleLoader.require = sinon.stub().resolves({
+        default: expectedConfig
+      });
+
+      const actual = await config.read();
+      expect(actual).to.deep.equal(expectedConfig);
+    });
+
+    it("should handle regular CommonJS modules", async () => {
+      const expectedConfig = {
+        mongodb: {
+          url: 'mongodb://localhost:27017',
+          databaseName: 'test'
+        }
+      };
+
+      moduleLoader.require = sinon.stub().resolves(expectedConfig);
+
+      const actual = await config.read();
+      expect(actual).to.deep.equal(expectedConfig);
+    });
   });
 });