Define, build, and deploy a Cloudflare Container backed by a Durable Object and route Worker requests to it

Documented steps

1. Confirm the account is on the Workers Paid plan ($5/month), which is required for Containers.
2. Scaffold a project: npm create cloudflare@latest -- --template=cloudflare/templates/containers-template.
3. Write a Dockerfile for the container app. The image must run on linux/amd64; the image field in config can point at that Dockerfile path or a fully qualified registry reference.
4. Configure wrangler.jsonc: "containers": [{ "class_name": "MyContainer", "image": "./Dockerfile", "max_instances": 10 }], "durable_objects": { "bindings": [{ "name": "MY_CONTAINER", "class_name": "MyContainer" }] }, and "migrations": [{ "tag": "v1", "new_sqlite_classes": ["MyContainer"] }].
5. Define the Container-backed Durable Object class: export class MyContainer extends Container { defaultPort = 8080; sleepAfter = '10s'; envVars = {...}; override onStart() {} override onStop() {} override onError(error) {} }.
6. Pick an instance type (lite, basic, standard-1 through standard-4) or a custom size within limits: 1-4 vCPU, up to 12 GiB memory at a minimum 3 GiB per vCPU, up to 20 GB disk.
7. In the Worker fetch handler, route to the container: const container = env.MY_CONTAINER.getByName(pathname); return await container.fetch(request); or use getRandom(env.MY_CONTAINER, n) to spread load across instances.
8. Deploy with npx wrangler deploy and confirm the container starts by checking onStart logs on the first request.
9. Official documentation verified for this route: https://developers.cloudflare.com/containers/ | https://developers.cloudflare.com/containers/get-started/ | https://developers.cloudflare.com/containers/platform-details/limits/ | https://developers.cloudflare.com/containers/pricing/