Improve Docker and development container support

[Nanle-code]

Summary:
The existing container setup should be refined to support a more reproducible development environment for contributors.

Why this matters:
Consistent development environments reduce setup issues and help contributors start working faster.

Proposed work:

• Improve Docker build and runtime consistency
• Document how to run the project in containers
• Validate the container setup with common workflows

Acceptance criteria:

• The container flow works reliably for contributors
• Setup instructions are easy to follow
• Development dependencies are reproducible

[Buchi-Einstein]

@Buchi-Einstein has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

can i work on this please, i can implement this effectively

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Buchi-Einstein to this issue.