Added makefile and use it within drone config

.drone.yml

@@ -1,14 +1,9 @@
 build:
   image: golang:1.5
-  environment:
-    - GO15VENDOREXPERIMENT=1
-    - GOOS=linux
-    - GOARCH=amd64
-    - CGO_ENABLED=0
   commands:
-    - go get
-    - go build
-    - go test
+    - make deps
+    - make build
+    - make test
 
 publish:
   docker:
@@ -21,10 +16,12 @@ publish:
 
 plugin:
   name: Webhook
-  desc: Send webhook notifications when your build completes.
+  desc: Send build status notifications via Webhook
   type: notify
   image: plugins/drone-webhook
   labels:
+    - notify
+    - webhook
     - rest
     - json
     - hook

Makefile

@@ -0,0 +1,22 @@
+.PHONY: clean deps test build
+
+export GOOS ?= linux
+export GOARCH ?= amd64
+export CGO_ENABLED ?= 0
+
+CI_BUILD_NUMBER ?= 0
+
+LDFLAGS += -X "main.buildDate=$(shell date -u '+%Y-%m-%d %H:%M:%S %Z')"
+LDFLAGS += -X "main.build=$(CI_BUILD_NUMBER)"
+
+clean:
+	go clean -i ./...
+
+deps:
+	go get -t ./...
+
+test:
+	go test -cover ./...
+
+build:
+	go build -ldflags '-s -w $(LDFLAGS)'