added a Dockerfile and Docker specific run instructions

.dockerignore

@@ -0,0 +1,7 @@
+*/.vscode/*
+*/bin/*
+*/pkg/**/*
+*/.env
+*/.gitignore
+*/vendor/pkg/**/*
+Dockerfile

Dockerfile

@@ -0,0 +1,15 @@
+FROM golang:1.8
+
+#install gb
+RUN go get github.com/constabulary/gb/... && \
+    go install github.com/constabulary/gb
+
+#build the project and start the server
+COPY ./src /app/src
+COPY ./vendor /app/vendor
+
+WORKDIR /app
+RUN gb build
+ENV GIN_MODE=release
+CMD ["bin/cowpoke"]
+

README.md

@@ -19,9 +19,18 @@ If you're using VSCode the following to your project settings.json to integrate
 
 ## Building and Running
 
+__Local__
   * ```gb build```
   * ```bin/cowpoke```
 
+__Via the included Dockerfile__
+
+* ```docker build -t <your name>/go-cowpoke . ```
+  * the Dockerfile takes care of compiling the project and setting up GB
+* ```docker run -ti --env-file ./.env -p 9000:9000 <your name>/go-cowpoke```
+  * starts the image on port 9000 using a local .env file for env vars
+  * env vars can also be passed in individual via ```-e```
+
 ## Dependencies
 
 Dependencies should be added to __/vendor__ see [vendoring in Go](https://blog.gopheracademy.com/advent-2015/vendor-folder/)

src/cowpoke/cowpoke.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"log"
 	"middleware/authentication"
 	"middleware/errors"
 	"os"
@@ -31,6 +32,8 @@ func main() {
 		routes.AddStackRoutes(api)
 	}
 
+	listenAddr := fmt.Sprintf(":%s", os.Getenv("HOST_PORT"))
+	log.Printf("service running on %s\n", listenAddr)
 	//start the server
-	r.Run(fmt.Sprintf(":%s", os.Getenv("HOST_PORT")))
+	r.Run(listenAddr)
 }