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[CI:DOCS] Fix typos and improve language

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Signed-off-by: Erik Sjölund <erik.sjolund@gmail.com>
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Erik Sjölund
2022-01-25 21:55:55 +01:00
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docs/tutorials/03-on-build.md
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@@ -31,7 +31,7 @@ We can also see that there are also no containers by running:
## Examples
The two examples that will be shown are relatively simple, but they illustrate how a command or a number of commands can be setup in a master image such that they will be added to a secondary container image that is created from it. This is extremely useful if you need to setup an environment where your containers have 75% of the same content, but need a few individual tweaks. This can be helpful in setting up a environment for maven or java development containers for instance. In this way you can create a single Dockerfile with all the common setup steps as ONBUILD commands and then really minimize the buildah commands or instructions in a second Dockerfile that would be necessary to complete the creation of the container image.
The two examples that will be shown are relatively simple, but they illustrate how a command or a number of commands can be setup in a master image such that they will be added to a secondary container image that is created from it. This is extremely useful if you need to setup an environment where your containers have 75% of the same content, but need a few individual tweaks. This can be helpful in setting up an environment for maven or java development containers for instance. In this way you can create a single Dockerfile with all the common setup steps as ONBUILD commands and then really minimize the buildah commands or instructions in a second Dockerfile that would be necessary to complete the creation of the container image.
NOTE: In the examples below the option `--format=docker` is used in several places. If you wanted to omit that, you could define the `BUILDAH_FORMAT` environment variable and set it to 'docker'. On Fedora that command would be `export BUILDAH_FORMAT=docker`.