update node version

Author: eisbilir

Dockerfile

@@ -4,7 +4,7 @@ RUN sed -i '/stretch-updates/d' /etc/apt/sources.list
 RUN sed -i 's/security.debian/archive.debian/' /etc/apt/sources.list
 RUN sed -i 's/deb.debian/archive.debian/' /etc/apt/sources.list
 
-RUN apt-get update && wget -qO- https://deb.nodesource.com/setup_8.x | bash - && apt-get install -y nodejs libpq-dev g++ make
+RUN apt-get update && wget -qO- https://deb.nodesource.com/setup_12.x | bash - && apt-get install -y nodejs libpq-dev g++ make
 
 WORKDIR /opt/app
 COPY . .