Add Db2 Docker container setup and configuration

[Torch3333]

Description

Add sample configuration and docker-compose setup for Db2.
This PR accompanies the documentation update for the Db2 adapter, see https://github.com/scalar-labs/docs-internal-scalardb/pull/1345

Related issues and/or PRs

• https://github.com/scalar-labs/docs-internal-scalardb/pull/1345

Changes made

Add configuration and docker-compose setup for Db2.

Checklist

The following is a best-effort checklist. If any items in this checklist are not applicable to this PR or are dependent on other, unmerged PRs, please still mark the checkboxes after you have read and understood each item.

• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation to reflect the changes.
• Any remaining open issues linked to this PR are documented and up-to-date (Jira, GitHub, etc.).
• Tests (unit, integration, etc.) have been added for the changes.
• My changes generate no new warnings.
• Any dependent changes in other PRs have been merged and published.

Additional notes (optional)

N/A

[gemini-code-assist]

Summary of Changes

Hello @Torch3333, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the project's database support by integrating Db2. It provides the necessary Docker Compose configurations to run a Db2 instance locally and includes example property files to guide users on how to connect ScalarDB applications to Db2. Additionally, it ensures all relevant ScalarDB dependencies and images are updated to the latest 3.16.0 version, bringing in any new features or fixes from that release.

Highlights

• Db2 Docker Integration: Added Docker Compose service definitions for Db2 Community Edition to scalardb-cluster-standalone-mode, scalardb-kotlin-sample, and scalardb-sample projects. This enables easy local setup of a Db2 instance, exposing port 50000 and configuring necessary environment variables for a sample database.
• Db2 Configuration Examples: Included commented-out configuration properties for connecting ScalarDB to a Db2 database in scalardb-cluster-standalone-mode/scalardb-cluster-node.properties, scalardb-kotlin-sample/database.properties, and scalardb-sample/database.properties. These provide a clear template for users to switch from Cassandra to Db2.
• ScalarDB Dependency Update: Updated the scalardb library dependency from version 3.13.0 to 3.16.0 across scalardb-kotlin-sample and scalardb-sample projects. Correspondingly, the scalardb-cluster-node image in scalardb-cluster-standalone-mode was also updated to 3.16.0.

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[gemini-code-assist]

Code Review

This pull request introduces Db2 support by adding its configuration to Docker Compose and properties files. It also updates the scalardb dependency version. The use of privileged: true in the Docker Compose files poses a security risk, and the Db2 connection string in scalardb-cluster-standalone-mode properties uses localhost instead of the Docker service name.

[komamitsu]

LGTM, thank you!

[brfrn169]

LGTM! Thank you!

[feeblefakie]

LGTM! Thank you!