fix: disable gzip compression in nginx proxy configuration

- Add gzip off directive to prevent nginx from compressing proxied responses
- Ensures stream integrity for chunked transfer encoding
- Applies to both production and local Dockerfiles

Dockerfile.base

@@ -70,6 +70,7 @@ RUN printf '%s\n' \
 '        proxy_cache off;' \
 '        proxy_request_buffering off;' \
 '        chunked_transfer_encoding on;' \
+'        gzip off;' \
 '        proxy_connect_timeout 600s;' \
 '        proxy_send_timeout 600s;' \
 '        proxy_read_timeout 600s;' \