Change to docker SDK to fix config error

Dockerfile

@@ -0,0 +1,5 @@
+FROM nginx:alpine
+COPY . /usr/share/nginx/html
+RUN sed -i 's/listen  *80;/listen 7860;/g' /etc/nginx/conf.d/default.conf
+EXPOSE 7860
+CMD ["nginx", "-g", "daemon off;"]

README.md

@@ -3,8 +3,8 @@ title: OS-Arena
 emoji: 🏟️
 colorFrom: gray
 colorTo: blue
-sdk: static
+sdk: docker
 pinned: false
 ---
 # 🏟️ OS-Arena
-This space hosts the compiled frontend for OS-Arena.
+This space hosts the compiled frontend for OS-Arena using a Docker nginx container.