Merge pull request #47 from rm-yakovenko/Refactor-node

Refactor - node version arg

Author: rm-yakovenko

docker/app/Dockerfile

@@ -16,7 +16,9 @@ RUN apt-get -y update && \
 RUN curl -Lo /usr/bin/composer https://getcomposer.org/composer-stable.phar && \
     chmod +x /usr/bin/composer
 
-RUN curl -sL https://deb.nodesource.com/setup_16.x | bash && \
+ARG NODE_VERSION=16
+
+RUN curl -sL https://deb.nodesource.com/setup_${NODE_VERSION}.x | bash && \
     apt-get install -y nodejs
 
 ARG CONTAINER_USER