Fix 502 via Docker Updates

My production site runs inside several Docker containers on an Ubuntu droplet hosted at DigitalOcean. A persistent “502 Bad Gateway” has appeared and the logs point to outdated images that have not been refreshed in a while. I need a DevOps-minded engineer to step in, bring every image up to the latest stable tag, and get the site responding again.

You will receive SSH access along with the current docker-compose.yml and any relevant environment files. Your job is to:

• audit each image version,
• pull and rebuild with the latest compatible releases,
• apply any configuration tweaks required by the newer images,
• restart the stack with zero data loss, and
• confirm that the public URL returns 200 OK instead of the current 502.

The stack is fairly straightforward—main web application plus supporting services—so the focus is on image hygiene, network/port alignment, and nginx-style reverse-proxy health checks (even though the droplet itself is simply Ubuntu, the proxy inside the containers is what feeds traffic).

Please document every change in a short markdown changelog so I can reproduce the fix later, and include the commands you used to verify container health. The engagement is complete when the site loads normally and the compose file references up-to-date images only.