diff --git a/Dockerfile b/Dockerfile
index f2d937b..b305826 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,8 @@
 FROM ruby:3.2-slim
 LABEL fnkit.fn="true"
 WORKDIR /app
-COPY Gemfile Gemfile.lock ./
+COPY Gemfile ./
 RUN bundle install
 COPY . .
-CMD ["bundle", "exec", "functions-framework-ruby", "--target=hello"]
+EXPOSE 8080
+CMD ["bundle", "exec", "functions-framework-ruby", "--target=hello", "--port=8080"]