fixing nginx 404 on refresh

OpenCand.UI.dockerfile

@@ -17,6 +17,8 @@ RUN yarn build
 FROM nginx:stable-alpine
 # Remove default nginx html
 RUN rm -rf /usr/share/nginx/html/*
+# Replace default nginx.conf
+COPY nginx.conf /etc/nginx/nginx.conf
 # Copy our built files into nginx’s html folder
 COPY --from=builder /app/dist /usr/share/nginx/html