Add PUBLIC_URL env var

src/auth.go

@@ -32,7 +32,7 @@ func lnAuth() (*LnAuth, error) {
 		return nil, fmt.Errorf("rand.Read error: %w", err)
 	}
 	k1hex := hex.EncodeToString(k1)
-	url := []byte(fmt.Sprintf("https://delphi.market/api/login?tag=login&k1=%s&action=login", k1hex))
+	url := []byte(fmt.Sprintf("https://%s/api/login?tag=login&k1=%s&action=login", PUBLIC_URL, k1hex))
 	conv, err := bech32.ConvertBits(url, 8, 5, true)
 	if err != nil {
 		return nil, fmt.Errorf("bech32.ConvertBits error: %w", err)

src/router.go

@@ -43,7 +43,7 @@ func login(c echo.Context) error {
 		return err
 	}
 	qr := base64.StdEncoding.EncodeToString([]byte(png))
-	return c.Render(http.StatusOK, "login.html", map[string]any{"session": c.Get("session"), "lnurl": lnauth.lnurl, "qr": qr})
+	return c.Render(http.StatusOK, "login.html", map[string]any{"session": c.Get("session"), "PUBLIC_URL": PUBLIC_URL, "lnurl": lnauth.lnurl, "qr": qr})
 }
 
 func verifyLogin(c echo.Context) error {

src/server.go

@@ -21,6 +21,7 @@ var (
 	COMMIT_SHORT_SHA string
 	VERSION          string
 	PORT             int
+	PUBLIC_URL       string
 )
 
 func execCmd(name string, args ...string) string {
@@ -37,6 +38,7 @@ func init() {
 	if err != nil {
 		log.Fatal("Error loading .env file")
 	}
+	flag.StringVar(&PUBLIC_URL, "PUBLIC_URL", "delphi.market", "Public URL of website")
 	flag.IntVar(&PORT, "PORT", 4321, "Server port")
 	flag.Parse()
 	e = echo.New()
@@ -47,6 +49,7 @@ func init() {
 	COMMIT_SHORT_SHA = execCmd("git", "rev-parse", "--short", "HEAD")
 	VERSION = fmt.Sprintf("v0.0.0+%s", COMMIT_SHORT_SHA)
 	log.Printf("Running commit %s", COMMIT_SHORT_SHA)
+	log.Printf("Public URL: %s", PUBLIC_URL)
 }
 
 func main() {

template/login.html

@@ -64,7 +64,7 @@
         const redirect = setInterval(() => {
           countdown.textContent = `Redirecting in ${timer--} ...`
           if (timer === -1) {
-            window.location.href = "https://delphi.market/";
+            window.location.href = "https://{{.PUBLIC_URL}}/";
           }
         }, 1000)
       }