[1.x] Fix NODE_VERSION on buid. (#274)

If `NODE_VERSION` declared as `ENV` variable and overwritten in `docker-compose.yml`, new value is not available in build.

Author: finagin

runtimes/7.4/Dockerfile

@@ -3,12 +3,12 @@ FROM ubuntu:21.04
 LABEL maintainer="Taylor Otwell"
 
 ARG WWWGROUP
+ARG NODE_VERSION=16
 
 WORKDIR /var/www/html
 
 ENV DEBIAN_FRONTEND noninteractive
 ENV TZ=UTC
-ENV NODE_VERSION=16
 
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 

runtimes/8.0/Dockerfile

@@ -3,12 +3,12 @@ FROM ubuntu:21.04
 LABEL maintainer="Taylor Otwell"
 
 ARG WWWGROUP
+ARG NODE_VERSION=16
 
 WORKDIR /var/www/html
 
 ENV DEBIAN_FRONTEND noninteractive
 ENV TZ=UTC
-ENV NODE_VERSION=16
 
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 

runtimes/8.1/Dockerfile

@@ -3,12 +3,12 @@ FROM ubuntu:21.04
 LABEL maintainer="Taylor Otwell"
 
 ARG WWWGROUP
+ARG NODE_VERSION=16
 
 WORKDIR /var/www/html
 
 ENV DEBIAN_FRONTEND noninteractive
 ENV TZ=UTC
-ENV NODE_VERSION=16
 
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone