During November 2025, Lethanix enhanced the localstack/localstack-docs repository by updating documentation to surface the ECR_ENDPOINT_STRATEGY environment variable for LocalStack container configuration. This work focused on reducing setup friction for developers integrating with AWS ECR by providing explicit guidance and ensuring documentation accurately reflected current container options. Lethanix authored changes in MDX, leveraging skills in documentation, AWS, and LocalStack, and maintained clear changelog traceability through Git. The update involved careful revision of lambda-ecr-container-images.mdx, coordinating across repositories to align documentation with evolving container features. The work demonstrated attention to detail and improved onboarding for developers configuring LocalStack environments.