Add default value for RFC

build/esbuild-build.ts

@@ -29,7 +29,7 @@ export const esBuildContext: esbuild.BuildOptions = {
     SUPABASE_STORAGE_KEY: generateSupabaseStorageKey(),
     commitHash: execSync(`git rev-parse --short HEAD`).toString().trim(),
     NODE_ENV: process.env.NODE_ENV || "development",
-    IS_RFC: JSON.parse(process.env.RFC!)
+    IS_RFC: JSON.parse(process.env.RFC ?? "false")
   }),
 };