Enable routing via /functions/ endpoint

sample-functions/WebhookStash/handler.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strconv"
+	"time"
+)
+
+func main() {
+	input, _ := ioutil.ReadAll(os.Stdin)
+	fmt.Println("Stashing request")
+	now := time.Now()
+	stamp := strconv.FormatInt(now.UnixNano(), 10)
+
+	ioutil.WriteFile(stamp+".txt", input, 0644)
+}