Add docker for building

Makefile

@@ -0,0 +1,37 @@
+app_name := haskell-cron-matcher
+image := ${app_name}-stack
+
+container_work_dir := /app
+cache_dir := ${container_work_dir}/.stack-work
+
+uid := $(shell id -u)
+gid := $(shell id -g)
+
+stack := docker run \
+	--rm \
+	--tty \
+	--init \
+	--user "${uid}:${gid}" \
+	--volume "${PWD}:${container_work_dir}" \
+	--env "STACK_ROOT=${cache_dir}" \
+	--workdir "${container_work_dir}" \
+	${image}
+
+# Targets
+
+.PHONY: build-docker
+build-docker:
+	docker build --tag=${image} .
+	${stack} stack --system-ghc --local-bin-path=./.local install hindent hfmt
+
+.PHONY: build
+build:
+	${stack} stack build
+
+.PHONY: test
+test:
+	${stack} stack test
+
+.PHONY: format
+format:
+	${stack} .local/hfmt -w src/