Add whoami service

Dockerfile

@@ -0,0 +1,7 @@
+FROM ubuntu:14.04
+
+RUN apt-get update && apt-get install -y golang-go
+ADD . /app
+WORKDIR /app
+RUN go build -o http
+CMD ["/app/http"]

http.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+  "os"
+  "fmt"
+  "net/http"
+  "log"
+)
+
+func main() {
+    port := os.Getenv("PORT")
+    if port == "" {
+        port = "8080"
+    }
+
+    fmt.Fprintf(os.Stdout, "Listening on :%s\n", port)
+    hostname, _ := os.Hostname()
+    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+        fmt.Fprintf(os.Stdout, "I'm %s\n", hostname)
+ 	fmt.Fprintf(w, "I'm %s\n", hostname)
+    })
+
+
+    log.Fatal(http.ListenAndServe(":" + port, nil))
+}
+