diff --git a/Dockerfile b/Dockerfile
index 6e8acef..a31eab3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,2 +1,11 @@
+
 FROM nginx:alpine
+
+# Copy site files
 COPY . /usr/share/nginx/html
+
+# Replace the default nginx config to listen on 3000
+RUN sed -i 's/listen       80;/listen 3000;/' /etc/nginx/conf.d/default.conf
+
+EXPOSE 3000
+