dockerContainers() resolved hanging issue

lib/docker.js

@@ -162,6 +162,9 @@ function dockerContainers(all, callback) {
               if (callback) { callback(result); }
               resolve(result);
             }
+          } else {
+            if (callback) { callback(result); }
+            resolve(result);
           }
         } catch (err) {
           // GC in _docker_container_stats

lib/network.js

@@ -745,7 +745,8 @@ function networkInterfaces(callback, rescan = true) {
           _ifaces = Object.assign({}, ifaces);
 
           if (_windows) {
-            getWindowsNics().forEach(nic => {
+            nics = getWindowsNics();
+            nics.forEach(nic => {
               let found = false;
               Object.keys(ifaces).forEach(key => {
                 if (!found) {
@@ -763,7 +764,6 @@ function networkInterfaces(callback, rescan = true) {
             });
 
             nics8021xInfo = getWindowsWiredProfilesInformation();
-            nics = getWindowsNics();
             dnsSuffixes = getWindowsDNSsuffixes();
           }
           if (_linux) {