Flip the script on the automated testing

.github/workflows/build.yaml

@@ -8,19 +8,19 @@
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     timeout-minutes: 30
     steps:
     - uses: actions/checkout@v6
     - uses: actions/setup-go@v6
       with:
-        go-version: '1.25.0'
+        go-version-file: go.mod
     - run: yarn install --frozen-lockfile
     - run: yarn lint
-    - run: yarn cucumber
+    - run: go test ./...
       env:
         DOCKER_HOST: unix:///var/run/docker.sock
   build:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.25.1-alpine@sha256:b6ed3fd0452c0e9bcdef5597f29cc1418f61672e9d3a2f55bf02e7222c014abd AS builder
+FROM golang:1.26.2-alpine@sha256:f85330846cde1e57ca9ec309382da3b8e6ae3ab943d2739500e08c86393a21b1 AS builder
 
 WORKDIR /netlib
 

cmd/testproxy/main.go

@@ -39,12 +39,16 @@ func main() {
 	interrupts := make(map[string]bool)
 	http.HandleFunc("/create", func(w http.ResponseWriter, r *http.Request) {
 		id := r.FormValue("id")
+		host := r.FormValue("host")
+		if host == "" {
+			host = "127.0.0.1"
+		}
 		port := r.FormValue("port")
 		laddr, err := net.ResolveUDPAddr("udp", "127.0.0.1:0")
 		if err != nil {
 			panic(err)
 		}
-		raddr, err := net.ResolveUDPAddr("udp", "127.0.0.1:"+port)
+		raddr, err := net.ResolveUDPAddr("udp", net.JoinHostPort(host, port))
 		if err != nil {
 			panic(err)
 		}
@@ -113,7 +117,7 @@ func main() {
 	addr := util.Getenv("ADDR", ":8080")
 	server := &http.Server{
 		Addr:    addr,
-		Handler: http.DefaultServeMux,
+		Handler: withCORS(http.DefaultServeMux),
 	}
 	go func() {
 		if err := server.ListenAndServe(); err != nil && err != http.ErrServerClosed {
@@ -130,3 +134,16 @@ func main() {
 		logger.Fatal("failed to shutdown server", zap.Error(err))
 	}
 }
+
+func withCORS(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
+		w.Header().Set("Access-Control-Allow-Headers", "Content-Type")
+		if r.Method == http.MethodOptions {
+			w.WriteHeader(http.StatusNoContent)
+			return
+		}
+		next.ServeHTTP(w, r)
+	})
+}