update node 14

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:12-buster-slim
+FROM node:14-buster-slim
 RUN mkdir -p /usr/share/man/man1 /usr/share/man/man5 /usr/share/man/man7
 RUN apt update && apt -y upgrade && apt -y install python xorg-dev libxshmfence1 \
                        build-essential clang libdbus-1-dev libgtk-3-dev \