feat(templates): Get static mounted images

templates/templates.go

@@ -3,6 +3,8 @@ package templates
 import (
 	_ "embed"
 	"fmt"
+	"log"
+	"os"
 )
 
 //go:embed card/en.html
@@ -44,10 +46,10 @@ func GetTemplate(locale, templateName string) (string, error) {
 }
 
 func GetImage(imageName string) string {
-	switch imageName {
-	case "sponsoringheader":
-		return ImageSponsoringHeaderBase64
-	default:
+	content, err := os.ReadFile("static/images/" + imageName + ".base64")
+	if content == nil || err != nil {
+		log.Printf("error reading image %s: %v", imageName, err)
 		return ImageErrorBase64
 	}
+	return string(content)
 }