Add support to build gianarb/orbiter docker image

Dockerfile

@@ -0,0 +1,5 @@
+FROM alpine
+
+ADD ./bin/orbiter /opt/orbiter
+
+CMD ["/opt/orbiter", "daemon", "-config", "/etc/orbiter.yml"]

Makefile

@@ -8,8 +8,12 @@ binaries:
 	@echo "Compiling..."
 	@mkdir -p ./bin
 	@go build -i -o ./bin/orbiter
+	@CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -i -o ./bin/orbiter
 	@echo "All done! The binaries is in ./bin let's have fun!"
 
+build/docker: binaries
+	@docker build -t gianarb/orbiter:latest .
+
 vet: ## run go vet
 	@test -z "$$(go vet ${PACKAGES} 2>&1 | grep -v '*composite literal uses unkeyed fields|exit status 0)' | tee /dev/stderr)"
 

README.md

@@ -106,3 +106,15 @@ func CreateAutoScaler() *autoscaler.Autoscaler{
     return a
 }
 ```
+
+## With docker
+
+```sh
+docker run -it -v ${PWD}/your.yml:/etc/orbiter.yml -p 8000:8000 gianarb/orbiter
+```
+We are supporting an imag `gianarb/orbiter` in hub.docker.com. You can run it
+with your configuration.
+
+In this example I am using volumes but if you have a Docker Swarm 1.13 up and
+running you can use secrets.
+