diff --git a/frontend/Dockerfile.railway b/frontend/Dockerfile.railway
index 818bfc2c..c7e06ea4 100644
--- a/frontend/Dockerfile.railway
+++ b/frontend/Dockerfile.railway
@@ -16,13 +16,16 @@ RUN pnpm install --frozen-lockfile
 # Rebuild the source code only when needed
 FROM base AS builder
 WORKDIR /app
-COPY --from=deps /app/node_modules ./node_modules
-COPY frontend .
 
 # Enable pnpm
 RUN corepack enable && corepack prepare pnpm@latest --activate
 
+COPY --from=deps /app/node_modules ./node_modules
+COPY frontend .
 
+# Accept BACKEND_URL as build argument
+ARG BACKEND_URL
+ENV BACKEND_URL=${BACKEND_URL}
 
 # Build Next.js app
 RUN pnpm run build