app import: restore icon, tag, label, proxy configs etc

src/apps.js

@@ -71,6 +71,7 @@ exports = module.exports = {
     uploadFile,
 
     backupConfig,
+    restoreConfig,
 
     PORT_TYPE_TCP: 'tcp',
     PORT_TYPE_UDP: 'udp',
@@ -1695,7 +1696,7 @@ function clone(app, data, user, auditSource, callback) {
                     label: app.label ? `${app.label}-clone` : '',
                     tags: app.tags,
                     enableAutomaticUpdate: app.enableAutomaticUpdate,
-                    icons: icons.icon
+                    icon: icons.icon
                 };
 
                 appdb.add(newAppId, appStoreId, manifest, location, domain, translatePortBindings(portBindings, manifest), data, function (error) {
@@ -2217,3 +2218,19 @@ function backupConfig(app, callback) {
         callback(null);
     });
 }
+
+function restoreConfig(app, callback) {
+    assert.strictEqual(typeof app, 'object');
+    assert.strictEqual(typeof callback, 'function');
+
+    const appConfig = safe.JSON.parse(safe.fs.readFileSync(path.join(paths.APPS_DATA_DIR, app.id + '/config.json')));
+    let data = {};
+    if (appConfig) {
+        data = _.pick(appConfig, 'memoryLimit', 'cpuShares', 'enableBackup', 'reverseProxyConfig', 'env', 'servicesConfig', 'label', 'tags', 'enableAutomaticUpdate');
+    }
+
+    const icon = safe.fs.readFileSync(path.join(paths.APPS_DATA_DIR, app.id + '/icon.png'));
+    if (icon) data.icon = icon;
+
+    appdb.update(app.id, data, callback);
+}