registry: implement redis backend (#2179)

internal/registry/redis/lua/lua.go

@@ -0,0 +1,20 @@
+// Package lua contains lua source code.
+package lua
+
+import (
+	"embed"
+)
+
+//go:embed registry.lua
+var fs embed.FS
+
+// Registry is the registry lua script
+var Registry string
+
+func init() {
+	bs, err := fs.ReadFile("registry.lua")
+	if err != nil {
+		panic(err)
+	}
+	Registry = string(bs)
+}