use node-14.x (#90)

Author: dulmandakh

Dockerfile

@@ -10,7 +10,7 @@ ARG ANDROID_BUILD_VERSION=29
 ARG ANDROID_TOOLS_VERSION=29.0.3
 ARG BUCK_VERSION=2020.10.21.01
 ARG NDK_VERSION=20.1.5948944
-ARG NODE_VERSION=12.x
+ARG NODE_VERSION=14.x
 ARG WATCHMAN_VERSION=4.9.0
 
 # set default environment variables