minimal go backend w/ dockerfile

backend/cmd/app/main.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	//"encoding/json"
+	"log"
+	"net/http"
+	"fmt"
+
+	"github.com/gorilla/mux"
+)
+
+func main() {
+	router := mux.NewRouter()
+	router.HandleFunc("/ping", ping).Methods("GET")
+
+	log.Fatal(http.ListenAndServe(":8080", router))
+}
+
+func ping(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "pong")
+}