Update DEVELOPER_GUIDE.md (opensearch-project#9368)

When building the OpenSearch Dashboards artifact for Linux, the build may fail on certain distributions. This issue stems from the recent upgrade from node-sass to dart-sass. The new process uses an embeddable module from dart-sass to process Sass files, which relies on a platform-specific compiler. On Linux, this module depends on glibc. However, some distributions—like Alpine Linux—use musl libc instead, which is incompatible with this module. I'm updating the DEVELOPER_GUIDE documentation to help other developers choose the appropriate distro for Docker images and avoid the pitfalls I encountered.
See the issue I created in Github explaining this reasoning: opensearch-project#9329
Also the forum where I posted the kind of error you see when building with a Linux Distribution that is incompatible with glibc: https://forum.opensearch.org/t/docker-a-error-error-worker-exitted-unexpectedly-with-code-1-last-message-bundleid-embeddable-type-running/23214

Signed-off-by: Luis Beltrán <[email protected]>
Signed-off-by: Federico Silva <[email protected]>

DEVELOPER_GUIDE.md

@@ -374,7 +374,7 @@ You could pass one or multiple flags. If you don't pass any flag, `yarn build-pl
 Currently, the supported flags for this script are:
 
 - `darwin` (builds Darwin x64)
-- `linux` (builds Linux x64)
+- `linux` (builds Linux x64) **Note:** This build relies on the `dart-sass-embeddable` module, which uses `glibc`. Some Linux distributions (such as Alpine Linux) use `musl` instead of `glibc` and are not compatible with this build. If you are using a musl-based distro, consider building on a glibc-based environment (for example, using a Docker image based on Debian or CentOS) to avoid compatibility issues.
 - `linux-arm` (builds Linux ARM64).
 - `windows` (builds Windows x64)