Merge pull request #246 from yannoff/documentation/warn-on-cached-image-pitfall-when-using-copy

[documentation] Add caveat on COPY cached image
pull/251/head
Michele Locati 2021-01-10 21:39:34 +01:00 committed by GitHub
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@ -37,6 +37,17 @@ COPY --from=mlocati/php-extension-installer /usr/bin/install-php-extensions /usr
RUN install-php-extensions gd xdebug
```
#### *Beware*
*When building locally, be sure you have the latest version of the `mlocati/php-extension-installer` image by running :*
```sh
docker pull mlocati/php-extension-installer
```
*otherwise the `COPY` instruction could use a previously downloaded, outdated version of the image stored in the local docker cache.*
### Installing a specific version of an extension
Simply append `-<version>` to the module name.