# Containers configuration

Read the relevant documentation before choosing configuration fields or resource sizes.

| Task | Documentation |
| --- | --- |
| Configure the container image, Durable Object binding, class, migrations, and instance count | [Wrangler Containers configuration](https://developers.cloudflare.com/workers/wrangler/configuration/index.md#containers) |
| Select a predefined size or configure custom CPU, memory, and disk | [Limits and instance types](https://developers.cloudflare.com/containers/platform/limits/index.md) and [custom instance configuration](https://developers.cloudflare.com/workers/wrangler/configuration/index.md#custom-instance-types) |
| Set ports, readiness checks, idle timeout, entrypoint, or internet access | [Container properties](https://developers.cloudflare.com/containers/api/container-class/index.md#properties) |
| Set runtime variables or pass secrets per instance | [Environment variables](https://developers.cloudflare.com/containers/configuration/environment-variables/index.md) and [environment variables and secrets example](https://developers.cloudflare.com/containers/examples/env-vars-and-secrets/index.md) |
| Build images or use existing registry images | [Image management](https://developers.cloudflare.com/containers/guides/image-management/index.md) |
| Run and iterate locally | [Local development](https://developers.cloudflare.com/containers/guides/local-dev/index.md) |
| Deploy from a workstation or Workers Builds | [Deploy Containers](https://developers.cloudflare.com/containers/guides/deploy/index.md) |
| Control image updates and replacement of running instances | [Rollouts](https://developers.cloudflare.com/containers/configuration/rollouts/index.md) |
| Estimate resource and network costs | [Pricing](https://developers.cloudflare.com/containers/platform/pricing/index.md) |