added testing environment

Dockerfile

@@ -0,0 +1,14 @@
+FROM daknuett/python3
+
+ADD . /test
+WORKDIR /test
+
+RUN find . -name __pycache__ -exec rm -rf {} +
+
+RUN python3 setup.py install
+
+CMD python3 -m pytest --cov=bunker \
+	--cov-report=xml:reports/coverage.xml \
+	--cov-report=term \
+	--cov-report=html:reports/coverage.html \
+	--cov-report=annotate -vv test/