diff --git a/packages/web/Dockerfile b/packages/web/Dockerfile
index 334fcd4..f036a20 100644
--- a/packages/web/Dockerfile
+++ b/packages/web/Dockerfile
@@ -15,6 +15,10 @@ RUN test -f .env.local || echo "# placeholder" > .env.local
 # Install dependencies
 RUN pnpm install --frozen-lockfile --ignore-scripts
 
+# Inject NEXT_PUBLIC_API_URL at build time (Next.js bakes NEXT_PUBLIC_* into the bundle)
+ARG NEXT_PUBLIC_API_URL
+ENV NEXT_PUBLIC_API_URL=$NEXT_PUBLIC_API_URL
+
 # Build
 RUN pnpm build
 
@@ -38,4 +42,4 @@ ENV NEXT_TELEMETRY_DISABLED=1
 
 EXPOSE 3000
 
-CMD ["/app/node_modules/.bin/next", "start"]
\ No newline at end of file
+CMD ["/app/node_modules/.bin/next", "start"]