Signing works

web/shared/linstromUrlType.go

@@ -0,0 +1,16 @@
+package webshared
+
+import "strings"
+
+// TODO: Define linstrom uri type
+
+var hardcodedUrls = map[string]string{
+	"default-media": "/default-image",
+}
+
+func EnsurePublicUrl(rawUrl string) string {
+	if !strings.HasPrefix(rawUrl, "linstrom://") {
+		return rawUrl
+	}
+	return strings.Replace(rawUrl, "linstrom://", "/", 1)
+}