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Update build.md (#4986)

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Wang Jie 2017-10-17 07:59:31 +08:00 committed by Misty Stanley-Jones
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commit 1fae282146
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compose/reference/build.md
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@ -20,7 +20,7 @@ Services are built once and then tagged, by default as `project_service`, e.g.,
`composetest_db`. If the Compose file specifies an
[image](/compose/compose-file/index.md#image) name, the image will be
tagged with that name, substituting any variables beforehand. See [variable
substitution](#variable-substitution)
substitution](#variable-substitution).
If you change a service's Dockerfile or the contents of its
build directory, run `docker-compose build` to rebuild it.