Inject extra hosts

yaml

services:
  app:
    image: myapp:latest
    extra_hosts:
      - "host.docker.internal:host-gateway"

Explanation

Helpful for connecting back to services on the Docker host.

Learn the surrounding workflow

Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

Same sheet · prioritizing Resource and Runtime Controls

Restarts the service unless it is explicitly stopped.

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Sets per-container ulimits for file handles and similar resources.

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Maps host port 8080 to container port 80.

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Stores database data in a managed named volume.

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Mounts a file-backed secret into the container.

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Publishes the service only to the local machine.

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