Merge branch 'configurable_arch' into 'main'

docs(configure-arch): add description about how to configure build architectures

See merge request components/opentofu!203

.gitlab/README.md.template

@@ -578,6 +578,14 @@ See also the official GitLab documentation for it
 If you want to save runner resources you may disable the unit and integration tests
 by setting the `SKIP_TESTS` CI/CD variable to `true`.
 
+The component builds by default a multi-arch image for `linux/amd64` and `linux/arm64`.
+There are multiple reasons why you might want to change this behavior, like saving runner resources.
+To configure for what architectures the container image should be built, you can go to
+the CI/CD variables in the project settings and add a variable called `PLATFORMS`.
+The value is one or more `OS/ARCH[/VARIANT]`. If you have multiple platforms, they have to be comma separated.
+**Keep in mind that the component is tested with `linux/amd64` and `linux/arm64`,
+other platforms are not officially supported!**
+
 You can set the `OPENTOFU_COMPONENT_IMAGE_BUILD_RUNNER_TAG` CI/CD variable to a custom runner tag
 to use for the image build job. This may be useful if you require a dedicated privileged runner.
 

README.md

@@ -654,6 +654,14 @@ See also the official GitLab documentation for it
 If you want to save runner resources you may disable the unit and integration tests
 by setting the `SKIP_TESTS` CI/CD variable to `true`.
 
+The component builds by default a multi-arch image for `linux/amd64` and `linux/arm64`.
+There are multiple reasons why you might want to change this behavior, like saving runner resources.
+To configure for what architectures the container image should be built, you can go to
+the CI/CD variables in the project settings and add a variable called `PLATFORMS`.
+The value is one or more `OS/ARCH[/VARIANT]`. If you have multiple platforms, they have to be comma separated.
+**Keep in mind that the component is tested with `linux/amd64` and `linux/arm64`,
+other platforms are not officially supported!**
+
 You can set the `OPENTOFU_COMPONENT_IMAGE_BUILD_RUNNER_TAG` CI/CD variable to a custom runner tag
 to use for the image build job. This may be useful if you require a dedicated privileged runner.