fix(cloudflare): support remote images and external Dockerfiles in LocalContainerProvider

[john-royal]

LocalContainerProvider only handled the Effect-native main variant, so a container declared with a remote image (or an external context/dockerfile) died under alchemy dev with "Container requires a main entrypoint". The live ContainerProvider supports all three image variants; the local provider now mirrors it:

// main        → bundle + build context (unchanged)
// image       → dev: { imageUri } — the local runtime `docker pull`s it
// dockerfile  → dev: { context, dockerfile } — built against the user's context

Each variant also produces a content hash (sha256Object of the image URI, or directory hash + Dockerfile content) so change detection works the same as the main path.

Shared env handling

Replaced foldEnvIntoEnvironmentVariables with makeContainerEnv, shared by both providers. It returns a plain Record<string, string | Redacted> (merging env + environmentVariables + the injected ALCHEMY_CLOUDFLARE_ACCOUNT_ID) that each provider maps into its own environmentVariables shape.

The local provider keeps its per-run image cache env-free: the cache is warmed by precreate (unresolved props, so binding-derived env values are still Outputs and get skipped). makeAttributes attaches the freshly-computed env instead, so a container isn't started with an incomplete env frozen at precreate time.

Relative dev paths

dev.context / dev.dockerfile are now emitted as paths relative to process.cwd() (and dockerfile relative to context) in both providers, and diff compares the resolved dev object (deepEqual) so a changed build context or Dockerfile triggers an update.

Tests

• Container.test.ts is now parametrized over dev: true (local, test-local stage) and dev: false (live, test-live stage) via describe.concurrent.each, so every image variant is exercised against both runtimes. A fresh Test.make context is created per case because the local runner stops once the root scope closes.

[alchemy-version-bot]

Install the packages built from this commit:

alchemy

bun add alchemy@https://pkg.ing/alchemy/0e969b2

@alchemy.run/better-auth

bun add @alchemy.run/better-auth@https://pkg.ing/@alchemy.run/better-auth/0e969b2

@alchemy.run/pr-package

bun add @alchemy.run/pr-package@https://pkg.ing/@alchemy.run/pr-package/0e969b2