add some Docker images to make it easier to try against multiple versions of Django

Author: crccheck

Diff for: .dockerignore

@@ -0,0 +1,11 @@
+*.pyc
+.coverage
+
+.env
+.tox/
+*.db
+
+
+build/
+dist/
+*.egg-info

Diff for: Dockerfile

@@ -0,0 +1,12 @@
+FROM python:2-onbuild
+
+ARG DJANGO_VERSION
+
+RUN pip install django==$DJANGO_VERSION
+
+ENV PORT 8000
+EXPOSE 8000
+
+ENV PYTHONPATH /usr/src/app
+
+CMD python example_project/manage.py runserver 0.0.0.0:$PORT

Diff for: Makefile

@@ -35,6 +35,24 @@ resetdb: ## Delete and then recreate the dev sqlite database
 	python $(MANAGE) migrate --noinput
 	python $(MANAGE) loaddata sample_data
 
+IMAGE = crccheck/django-object-actions
+
+.PHONY: build
+build: ## Build a full set of Docker images
+build: build/1.9 build/1.8.7 build/1.7.11 build/1.6.11 build/1.5.12
+
+build/%:
+	docker build --build-arg DJANGO_VERSION=$* \
+	  -t $(IMAGE):$$(echo "$*" | cut -f 1-2 -d.) .
+
+run: run/1.9
+
+run/%:
+	docker run --rm -p 8000:8000 --sig-proxy=false $(IMAGE):$*
+
+bash:
+	docker run --rm -it $(IMAGE):1.9 /bin/bash
+
 version:
 	@sed -i -r /version/s/[0-9.]+/$(VERSION)/ setup.py
 	@sed -i -r /version/s/[0-9.]+/$(VERSION)/ django_object_actions/__init__.py