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docs: document how docker-compose-image-tag requires -dev suffixed images (#30144)
Co-authored-by: Sam Firke <sfirke@users.noreply.github.com>
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@@ -38,7 +38,12 @@ Note that there are 3 major ways we support to run `docker compose`:
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1. **docker-compose-image-tag.yml** where we fetch an image from docker-hub say for the
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`3.0.0` release for instance, and fire it up so you can try it. Here what's in
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the local branch has no effects on what's running, we just fetch and run
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pre-built images from docker-hub
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pre-built images from docker-hub. For `docker compose` to work along with the
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Postgres image it boots up, you'll want to point to a `-dev`-suffixed TAG, as in
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`export TAG=4.0.0-dev` or `export TAG=3.0.0-dev`, with `latest-dev` being the default.
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That's because The `dev` builds happen to package the `psycopg2-binary` required to connect
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to the Postgres database launched as part of the `docker compose` builds.
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``
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More on these two approaches after setting up the requirements for either.
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