removed hardcoded strings and added constants

lib/constants.js

@@ -19,3 +19,15 @@ export const API_HOST = "https://api.cloudflare.com/client/v4";
 export const DRY_RUN = !!parseInt(process.env.DRY_RUN, 10);
 
 export const FAST_MODE = !!parseInt(process.env.FAST_MODE, 10);
+
+export const PROCESSING_FILENAME = {
+  ALLOWLIST: "allowlist.txt",
+  BLOCKLIST: "blocklist.txt",
+  OLD_ALLOWLIST: "whitelist.csv",
+  OLD_BLOCKLIST: "input.csv",
+};
+
+export const LIST_TYPE = {
+  ALLOWLIST: "allowlist",
+  BLOCKLIST: "blocklist",
+};