diff --git a/Dockerfile b/Dockerfile
index 8f7b756..22491f7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,6 +8,8 @@ RUN npm ci
 
 # Copy source and build
 COPY . .
+ENV DATABASE_URL="postgresql://dummy:dummy@localhost:5432/dummy"
+ENV BETTER_AUTH_SECRET="build-time-placeholder-not-used"
 RUN npm run build
 
 # Production image