add Makefile, fix up Dockerfile to avoid pip installs

Dockerfile

@@ -1,5 +1,5 @@
 ARG NA_PYVERSION="${NA_PYVERSION:-3.9}"
-FROM python:${NA_PYVERSION}-slim
+FROM python:${NA_PYVERSION}-slim AS base
 
 ARG NA_USER="${NA_USER:-guido}"
 ARG TOX_DIR="${TOX_DIR:-/tox}"
@@ -12,9 +12,12 @@ USER "${NA_USER}"
 ENV PATH="${PATH}:/pip/.local/bin"
 
 RUN pip install -qq --upgrade pip
-COPY . /src
+COPY requirements.txt /src
+COPY requirements-dev.txt /src
 
 RUN pip install --user -r /src/requirements.txt \
     && pip install --user -r /src/requirements-dev.txt
 
+FROM base AS actual
+COPY . /src
 ENTRYPOINT ["tox", "-c", "/src/tox.ini", "--root", "${TOX_DIR}", "--workdir", "${TOX_DIR}"]

Makefile

@@ -0,0 +1,32 @@
+SHELL = /bin/sh
+VERSION = 0.3.0
+
+.PHONY: build build-py37 build-py38 build-py39
+.PHONE: test test-py37 test-py38 test-py39 clean
+
+all: test
+
+build-py37:
+	docker build -t "neo4j_arrow:${VERSION}-py37" .
+
+build-py38:
+	docker build -t "neo4j_arrow:${VERSION}-py38" .
+
+build-py39:
+	docker build -t "neo4j_arrow:${VERSION}-py39" .
+
+build: build-py37 build-py38 build-py39
+
+test-py37: build-py37
+	docker run --rm "neo4j_arrow:${VERSION}-py37"
+
+test-py38: build-py38
+	docker run --rm "neo4j_arrow:${VERSION}-py38"
+
+test-py39: build-py39
+	docker run --rm "neo4j_arrow:${VERSION}-py39"
+
+test: test-py37 test-py38 test-py39
+
+clean:
+	echo nop