Sort make targets and DOCKER_ENV vars in alphabetical order

Signed-off-by: Dieter Reuter <dieter.reuter@me.com>

Makefile

@@ -1,4 +1,4 @@
-.PHONY: all binary build cross default docs docs-build docs-shell shell test test-unit test-integration-cli test-docker-py validate
+.PHONY: all binary build cross default docs docs-build docs-shell shell test test-docker-py test-integration-cli test-unit validate
 
 # get OS/Arch of docker engine
 DOCKER_ENGINE_OSARCH = $(shell docker version | grep 'OS/Arch' | tail -1 | cut -d':' -f2 | tr -d '[[:space:]]')
@@ -22,15 +22,15 @@ DOCKER_ENVS := \
 	-e BUILDFLAGS \
 	-e DOCKER_CLIENTONLY \
 	-e DOCKER_DEBUG \
+	-e DOCKER_ENGINE_GOARCH \
+	-e DOCKER_ENGINE_GOOS \
+	-e DOCKER_ENGINE_OSARCH \
 	-e DOCKER_EXPERIMENTAL \
-	-e DOCKER_REMAP_ROOT \
+	-e DOCKER_FILE \
 	-e DOCKER_GRAPHDRIVER \
+	-e DOCKER_REMAP_ROOT \
 	-e DOCKER_STORAGE_OPTS \
 	-e DOCKER_USERLANDPROXY \
-	-e DOCKER_ENGINE_OSARCH \
-	-e DOCKER_ENGINE_GOOS \
-	-e DOCKER_ENGINE_GOARCH \
-	-e DOCKER_FILE \
 	-e TESTDIRS \
 	-e TESTFLAGS \
 	-e TIMEOUT
@@ -67,38 +67,38 @@ all: build
 binary: build
 	$(DOCKER_RUN_DOCKER) hack/make.sh binary
 
+build: bundles
+	docker build -t "$(DOCKER_IMAGE)" -f $(DOCKER_FILE) .
+
+bundles:
+	mkdir bundles
+
 cross: build
 	$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary binary cross
 
 deb: build
 	$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary build-deb
 
+docs:
+	$(MAKE) -C docs docs
+
 rpm: build
 	$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary build-rpm
 
+shell: build
+	$(DOCKER_RUN_DOCKER) bash
+
 test: build
 	$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary cross test-unit test-integration-cli test-docker-py
 
-test-unit: build
-	$(DOCKER_RUN_DOCKER) hack/make.sh test-unit
+test-docker-py: build
+	$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-docker-py
 
 test-integration-cli: build
 	$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-integration-cli
 
-test-docker-py: build
-	$(DOCKER_RUN_DOCKER) hack/make.sh dynbinary test-docker-py
+test-unit: build
+	$(DOCKER_RUN_DOCKER) hack/make.sh test-unit
 
 validate: build
 	$(DOCKER_RUN_DOCKER) hack/make.sh validate-dco validate-gofmt validate-pkg validate-lint validate-test validate-toml validate-vet
-
-shell: build
-	$(DOCKER_RUN_DOCKER) bash
-
-build: bundles
-	docker build -t "$(DOCKER_IMAGE)" -f $(DOCKER_FILE) .
-
-bundles:
-	mkdir bundles
-
-docs:
-	$(MAKE) -C docs docs