fix(rest): Listen on all interfaces if host is not configured

Author: raymondfeng

packages/rest/src/rest-server.ts

@@ -138,7 +138,8 @@ export class RestServer extends Context implements Server {
       options.port = 3000;
     }
     if (options.host == null) {
-      options.host = 'localhost';
+      // Set it to '' so that the http server will listen on all interfaces
+      options.host = undefined;
     }
     this.bind(RestBindings.PORT).to(options.port);
     this.bind(RestBindings.HOST).to(options.host);

packages/rest/test/unit/rest-server/rest-server.test.ts

@@ -71,13 +71,13 @@ describe('RestServer', () => {
       expect(server.getSync(RestBindings.PORT)).to.equal(3000);
     });
 
-    it('uses http host localhost by default', async () => {
+    it('uses undefined http host by default', async () => {
       const app = new Application({
         components: [RestComponent],
       });
       const server = await app.getServer(RestServer);
       const host = await server.getSync(RestBindings.HOST);
-      expect(host).to.equal('localhost');
+      expect(host).to.be.undefined();
     });
 
     it('can set port 0', async () => {