The phrase generally describes running a web copy in a container so the browser accesses it through a local network address instead of file://. The specific container image and commands are not universal, so this guide focuses on the deployment concepts that remain consistent.
Ports and local access
A containerized web service exposes a local port. Keep the service private unless you intentionally configure network access. If the page does not load, check whether the container is running and whether the expected host port is mapped.
Practical check
Keep the process small and testable. Make one meaningful change at a time, confirm the result, and preserve enough context to undo it if needed.
Persistent data and custom edits
Do not put important custom files only inside an ephemeral container layer. Keep persistent configuration or custom assets in a location you can back up and restore.
What to avoid
Avoid mixing advice from unrelated builds as if every copy behaves identically. Version, file structure, enabled data and hosting method can all change the correct next step.
Updating a containerized setup
Pull or prepare the replacement separately, note configuration differences, then test it on a different local port before replacing a working service.
Summary checklist
- Work from a clear reference goal.
- Keep source and version context visible.
- Preserve a known-good local backup.
- Test paths and browser behavior before making broad changes.
For a wider overview, return to the 5etools features section or open the complete guide library.