Fix Dockerfile path for static/index.html

Dockerfile

@@ -43,7 +43,10 @@ COPY omniroute-accounts.json /app/.omniroute/accounts.json
 COPY marimo_sandbox.py /app/marimo_sandbox.py
 
 # 8. Copy Static UI
-COPY marimo-zero-ui.html /app/static/index.html
+# marimo-zero-ui.html is copied to /app/static/index.html by deploy script
+# We just need to ensure the static directory exists
+RUN mkdir -p /app/static
+COPY static/index.html /app/static/index.html
 COPY nginx.conf /etc/nginx/nginx.conf
 
 # 9. Copy Proxy Server (routes all ports through 7860)