Merge pull request #3 from drone-plugins/feature/docker-task

Added make task for building docker container

Dockerfile

@@ -1,8 +1,7 @@
 # Docker image for the Drone Email plugin
 #
 #     cd $GOPATH/src/github.com/drone-plugins/drone-email
-#     make deps build
-#     docker build --rm=true -t plugins/drone-email .
+#     make deps build docker
 
 FROM alpine:3.2
 

Makefile

@@ -1,4 +1,4 @@
-.PHONY: clean deps test build
+.PHONY: clean deps test build docker
 
 export GOOS ?= linux
 export GOARCH ?= amd64
@@ -20,3 +20,6 @@ test:
 
 build:
 	go build -ldflags '-s -w $(LDFLAGS)'
+
+docker:
+	docker build --rm=true -t plugins/drone-email .

README.md

@@ -48,8 +48,7 @@ EOF
 Build the Docker container using `make`:
 
 ```sh
-make deps build
-docker build --rm=true -t plugins/drone-email .
+make deps build docker
 ```
 
 ### Example