feat(kibana): Add support for I18N_LOCALE environment variable

[dongyu6]

Summary

This pull request introduces the ability to configure the Kibana UI language directly via an I18N_LOCALE environment variable. This aligns with how other core settings (like ELASTICSEARCH_HOSTS) are configured in the Docker image, providing a more convenient setup for international users.

The Problem

Currently, to change the Kibana display language in a Docker environment, users must create a custom kibana. yml file, mount it into the container, and ensure all other necessary configurations are included. This process can be cumbersome, especially in automated or restricted environments where file mounting is not straightforward.

The Solution

This PR modifies the kibana-docker entrypoint script to:

1. Check for the presence of a new environment variable: I18N_LOCALE.
2. If the variable is set, it injects the corresponding i18n. locale key and value into the /usr/share/kibana/config/kibana. yml file before Kibana starts.

This allows users to simply add -e I18N_LOCALE="zh-CN" (or any other locale) to their docker run or docker-compose. yml file to set the language, without needing to manage custom configuration files.

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How to Test This Change

1. Clone the branch and navigate to the Kibana directory:

cd kibana

2. Build the Docker image locally:

docker build -t kibana-i18n-test .

3. Run a container with the new environment variable:

docker run -d --rm --name test-kibana-zh \
-e I18N_LOCALE="zh-CN" \
-e ELASTICSEARCH_HOSTS="http://some-es:9200" \
kibana-i18n-test

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[dongyu6]

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