chore: initialise backend

This won't be touched until a basic player prototype is implemented.
The backend itself is implemented in Go.

backend/go.mod

@@ -0,0 +1,3 @@
+module github.com/devraza/ambition/backend
+
+go 1.20

backend/main.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"log"
+	"net"
+	"os"
+)
+
+const (
+	serverAddress = "localhost:7764"
+)
+
+func main() {
+	log.Println("Ambition going strong at", serverAddress)
+
+	listener, err := net.Listen("tcp", serverAddress)
+	if err != nil {
+		log.Fatalln("Failed to initialise TCP listener", err)
+	}
+	defer listener.close()
+
+	for {
+		conn, err := listener.Accept()
+		if err != nil {
+			log.Println("Failed to accept connection:", err)
+			continue
+		}
+
+		// Concurrency FTW
+		go handleConnection(conn)
+	}
+}
+
+func handleConnection(conn net.Conn) {
+	defer conn.Close()
+
+	// TODO implement actual server. Waiting on frontend for this
+}