Add Dockerfile

Author: pascalandy

Dockerfile

@@ -0,0 +1,6 @@
+# The Dockerfile is not a real Dockerfile. 
+# Those vars are used broadly outside this Dockerfile
+# Github Action CI and release script (./utility.sh) is consuming these variables.
+ARG VERSION="2.3.0"
+ARG APP_NAME="docker-stack-this"
+ARG GIT_PROJECT_NAME="docker-stack-this"