fix: dockerfile nginx

Dockerfile.nginx

@@ -1,8 +1,8 @@
 FROM registry.willaspace.com/willaspace/willaengine-staging:latest AS php_builder
 
-WORKDIR /var/www/
+WORKDIR /var/www/html/
 RUN npm install
 RUN npm run staging
 
 FROM nginx:1.21.1
-COPY --from=php_builder /var/www /var/www/html
+COPY --from=php_builder /var/www/html /var/www/html