Add arg functionality

Author: DanWahlin

docker-compose.yml

@@ -8,6 +8,8 @@ services:
     build:
       context: .
       dockerfile: node.dockerfile
+      args:
+        buildversion: 1
     ports:
       - "3000:3000"
     networks:

node.dockerfile

@@ -21,8 +21,11 @@ FROM        node:alpine
 
 LABEL       author="Dan Wahlin"
 
+ARG         buildversion
+
 ENV         NODE_ENV=production
 ENV         PORT=3000
+ENV         build=$buildversion
 
 WORKDIR     /var/www
 COPY        package.json package-lock.json ./
@@ -31,4 +34,6 @@ RUN         npm install
 COPY        . ./
 EXPOSE      $PORT
 
+RUN         echo "Build version: $build"
+
 ENTRYPOINT  ["npm", "start"]