feat(muxterm): scaffold Go module with main.go entry point

muxterm/go.mod

@@ -0,0 +1,8 @@
+module github.com/muxplex/muxterm
+
+go 1.22
+
+require (
+	github.com/creack/pty v1.1.24
+	github.com/gorilla/websocket v1.5.3
+)

muxterm/go.sum

@@ -0,0 +1,2 @@
+github.com/creack/pty v1.1.24/go.mod h1:08sCNb52WyoAwi2QDyzUCTgcvVFhUzewun7wtTfvcwE=
+github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=

muxterm/main.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+)
+
+func main() {
+	addr := flag.String("addr", "127.0.0.1:7682", "listen address")
+	secret := flag.String("secret", os.Getenv("MUXTERM_SECRET"), "shared secret (or set MUXTERM_SECRET)")
+	flag.Parse()
+
+	if *secret == "" {
+		log.Fatal("secret is required: use --secret or set MUXTERM_SECRET")
+	}
+
+	pool := NewPool()
+
+	// Graceful shutdown on SIGTERM/SIGINT
+	sig := make(chan os.Signal, 1)
+	signal.Notify(sig, syscall.SIGTERM, syscall.SIGINT)
+	go func() {
+		<-sig
+		pool.CloseAll()
+		os.Exit(0)
+	}()
+
+	http.HandleFunc("/ws", func(w http.ResponseWriter, r *http.Request) {
+		HandleWebSocket(pool, *secret, w, r)
+	})
+
+	http.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		json.NewEncoder(w).Encode(map[string]string{"status": "ok"})
+	})
+
+	log.Printf("muxterm listening on %s", *addr)
+	if err := http.ListenAndServe(*addr, nil); err != nil {
+		log.Fatal(err)
+	}
+}