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Docker

Compose networking: service names, ports, healthchecks

unwritten—Outline
Note to self
Not written yet. This is the outline I am working from — it will be filled in as I go through the topic.
  • Service names as DNS: how containers find each other
  • Published ports vs internal ports — what localhost means where
  • depends_on plus healthchecks for real startup ordering
  • Custom networks and isolating a database
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