Add --port flag

README.md

@@ -43,4 +43,4 @@ The REST API currently exposes these Endpoints:
 | GET    | /mine_block | Mine a block with all pending transactions |
 | GET    | /is_valid   | Check, if the chain has any faulty blocks  |
 
-Refer to the [wiki](https://github.com/garritfra/blockchain-project/wiki) to get more information about the REST API
+Refer to the [wiki](https://github.com/garritfra/blockchain-project/wiki) to get more information about the REST API

main.go

@@ -1,9 +1,20 @@
 package main
 
 import (
+	"flag"
+	"fmt"
+	"strconv"
+
 	"github.com/garritfra/blockchain-project/server"
 )
 
 func main() {
-	server.ServeHTTP(":42000")
+	portFlag := flag.Int("port", 42000, "The port this service is running on")
+	flag.Parse()
+
+	var port string
+	port += ":"
+	port += strconv.Itoa(*portFlag)
+	fmt.Println(*portFlag)
+	server.ServeHTTP(port)
 }