Laminas ServiceManager and Docker: Configuration Cache Placement

Integration Boundary for Repeatable Environments

Building a repeatable development environment for a Laminas Project application (the community continuation of Zend Framework) commonly pairs Docker containers with the framework's ServiceManager. The ServiceManager merges global and local PHP configuration arrays, allowing environment-specific database and API credentials to be supplied at runtime rather than baked into source code.

Unresolved Caching Behavior

In traditional virtual machine deployments, caching the merged configuration array is a standard optimization. Inside a containerized workflow, immutable image layers and the need for runtime environment variables create uncertainty about where the configuration cache should live and how it should be invalidated without forcing a full image rebuild or breaking portability across hosts. Because Laminas is the actively maintained continuation of Zend Framework, version-specific behavior should be confirmed against current project documentation.

What is the supported approach for configuration caching when Laminas ServiceManager runs inside Docker containers? Should the cache be generated during the image build, persisted to a shared volume, or disabled entirely to preserve container portability?