Add some Docker targets

Makefile

@@ -6,3 +6,16 @@ coverage:
 
 lint:
 	pylint --disable=all --enable=F,E,unreachable,duplicate-key,unnecessary-semicolon,global-variable-not-assigned,unused-variable,binary-op-exception,bad-format-string,anomalous-backslash-in-string,bad-open-mode azfilebak
+
+docker-build:
+	docker build -t azfilebak .
+
+# File test.env can be used to pass a storage account key, e.g.
+# STORAGE_KEY='xxx'
+# Don't check in that file.
+
+docker-test:
+	docker run -t --env-file test.env azfilebak
+
+docker-clean:
+	docker rm -f `docker ps -qa`