diff --git a/Dockerfile.web b/Dockerfile.web
index afae4f91b..82b41a818 100644
--- a/Dockerfile.web
+++ b/Dockerfile.web
@@ -8,6 +8,8 @@ WORKDIR /app
 # Copy workspace config and all package.json files for dependency resolution
 COPY pnpm-lock.yaml pnpm-workspace.yaml package.json turbo.json .npmrc ./
 COPY apps/web/package.json apps/web/
+# postinstall runs fumadocs-mdx which reads apps/web/source.config.ts
+COPY apps/web/source.config.ts apps/web/source.config.ts
 COPY packages/core/package.json packages/core/
 COPY packages/ui/package.json packages/ui/
 COPY packages/views/package.json packages/views/