diff --git a/docs/Dockerfile b/docs/Dockerfile
index 51ad797..3ca8160 100644
--- a/docs/Dockerfile
+++ b/docs/Dockerfile
@@ -15,6 +15,8 @@ CMD ["npm", "run", "dev", "--", "--host", "0.0.0.0"]
 FROM base AS build
 RUN npm ci
 COPY . .
+ARG DOMAIN=localhost:4321
+ENV DOMAIN=${DOMAIN}
 ENV ASTRO_TELEMETRY_DISABLED=1
 RUN --mount=type=cache,target=/app/.astro \
     npm run build