serve content from current directory; configurable port

go.mod

@@ -0,0 +1,3 @@
+module github.com/tinacious/static-server
+
+go 1.20

main.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+	"strconv"
+
+	"github.com/tinacious/static-server/utils"
+)
+
+func main() {
+	port := utils.GetRandomPort()
+
+	// Use configured port
+	portString := os.Getenv("PORT")
+	if portString != "" {
+		i, err := strconv.Atoi(portString)
+		if err != nil {
+			fmt.Printf("⛔️ invalid port %s - using random port %d\n", portString, port)
+		} else {
+			port = i
+		}
+	} else {
+		fmt.Printf("🎲 using random port %d - to configure, set the environment variable PORT\n", port)
+	}
+
+	cwd, err := os.Getwd()
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Printf("🚀 static server at: http://localhost:%d with contents from %s\n", port, cwd)
+
+	http.Handle("/", http.FileServer(http.Dir(".")))
+	http.ListenAndServe(fmt.Sprintf(":%d", port), nil)
+}

utils/port_utils.go

@@ -0,0 +1,15 @@
+package utils
+
+import (
+	"math/rand"
+	"time"
+)
+
+func GetRandomPort() int {
+	var min int = 1024
+	var max int = 66535
+
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+
+	return r.Intn(max-min+1) + min
+}