diff --git a/Dockerfile.prod b/Dockerfile.prod
index 17f0f19..e0d112b 100644
--- a/Dockerfile.prod
+++ b/Dockerfile.prod
@@ -44,6 +44,21 @@ RUN pnpm --filter @capakraken/db db:generate
 # Build the Next.js application
 ENV NEXT_TELEMETRY_DISABLED=1
 ENV NODE_ENV=production
+# next build collects page data for /api/auth/[...nextauth] which crashes
+# without these envs even though they are placeholders at image-build time
+# (real values are injected at container start). Mirrors the CI build job.
+ARG NEXTAUTH_URL=http://localhost:3100
+ARG AUTH_URL=http://localhost:3100
+ARG NEXTAUTH_SECRET=ci-build-placeholder-secret-minimum-32-chars
+ARG AUTH_SECRET=ci-build-placeholder-secret-minimum-32-chars
+ARG DATABASE_URL=postgresql://placeholder:placeholder@localhost:5432/placeholder
+ARG REDIS_URL=redis://placeholder:6379
+ENV NEXTAUTH_URL=$NEXTAUTH_URL
+ENV AUTH_URL=$AUTH_URL
+ENV NEXTAUTH_SECRET=$NEXTAUTH_SECRET
+ENV AUTH_SECRET=$AUTH_SECRET
+ENV DATABASE_URL=$DATABASE_URL
+ENV REDIS_URL=$REDIS_URL
 RUN pnpm --filter @capakraken/web build
 
 # ============================================================