added docs and container (podman + docker) setup

docs/docker/README.md

@@ -0,0 +1,12 @@
+# Docker quick start
+
+```zsh
+# Build
+docker build -t argparse-builder .
+
+# Run
+docker run -d -p 8080:8080 argparse-builder
+
+# Or use compose
+docker-compose up -d
+```