fix #2435: align Node.js version with desktop VS Code

for better compatibility of VS Code extensions

Author: akosyakov

components/ide/code/leeway.Dockerfile

@@ -2,7 +2,7 @@
 # Licensed under the GNU Affero General Public License (AGPL).
 # See License-AGPL.txt in the project root for license information.
 
-FROM node:12.18.3 AS node_installer
+FROM node:12.14.1 AS node_installer
 RUN mkdir -p /ide/node/bin \
     /ide/node/include/node/ \
     /ide/node/lib/node_modules/npm/ \

components/theia/app/leeway.Dockerfile

@@ -5,7 +5,7 @@
 
 ################ Alpine ####################
 # copy nodejs from the official alpine-based image because of https://github.com/TypeFox/gitpod/issues/2579
-FROM node:12.18.3-alpine AS node_installer
+FROM node:12.14.1-alpine AS node_installer
 RUN mkdir -p /theia/node/bin \
     /theia/node/include/node/ \
     /theia/node/lib/node_modules/npm/ \