Document new predefined env vars in EA

deploy/early-access/reference/builds.md

@@ -36,8 +36,8 @@ A revision goes through these stages before becoming available:
    downloading dependencies.
 4. **Build**: The build command executes (if specified), creating a build
    artifact that is uploaded to the runtime infrastructure.
-5. **Warm up**: A `GET /` request tests that the application boots correctly and
-   can handle HTTP requests.
+5. **Warm up**: The application is booted to check that no errors occur during
+   startup.
 6. **Route**: The global infrastructure is configured to route requests to the
    new revision based on its timelines.
 
@@ -117,4 +117,20 @@ Environment variables configured for the "Build" context are available during
 builds, but variables from "Production" or "Development" contexts are not.
 [Learn more about environment variables](./env-vars-and-contexts/).
 
+The following environment variables are additionally always available during
+builds:
+
+- `CI`: `true`
+- `DENO_DEPLOY`: `true` - Indicates that the code is running in Deno Deploy.
+- `DENO_DEPLOY_ORGANIZATION_ID`: The ID of the organization that owns the
+  application. This is a UUID.
+- `DENO_DEPLOY_ORGANIZATION_SLUG`: The slug of the organization that owns the
+  application. This is the human-readable identifier used in URLs that was set
+  when creating the organization.
+- `DENO_DEPLOY_APPLICATION_ID`: The ID of the application. This is a UUID.
+- `DENO_DEPLOY_APPLICATION_SLUG`: The slug of the application. This is the
+  human-readable identifier used in URLs that was set when creating the
+  application, or changed later in the application settings.
+- `DENO_DEPLOY_BUILD_ID`: The ID of the currently running build.
+
 Builders have 8 GB of storage available during the build process.

deploy/early-access/reference/env-vars-and-contexts.md

@@ -100,11 +100,26 @@ const myEnvVar = Deno.env.get("MY_ENV_VAR");
 Deno Deploy<sup>EA</sup> provides these predefined environment variables in all
 contexts:
 
-- `DENO_DEPLOYMENT_ID`: A unique identifier representing the entire
-  configuration set (application ID, revision ID, context, and environment
-  variables). Changes if any of these components change.
+- `DENO_DEPLOY`: `true` - Indicates that the code is running in Deno Deploy.
+
+- `DENO_DEPLOY_ORGANIZATION_ID`: The ID of the organization that owns the
+  application. This is a UUID.
+
+- `DENO_DEPLOY_ORGANIZATION_SLUG`: The slug of the organization that owns the
+  application. This is the human-readable identifier used in URLs that was set
+  when creating the organization.
+
+- `DENO_DEPLOY_APPLICATION_ID`: The ID of the application. This is a UUID.
 
-- `DENO_REVISION_ID`: The ID of the currently running revision.
+- `DENO_DEPLOY_APPLICATION_SLUG`: The slug of the application. This is the
+  human-readable identifier used in URLs that was set when creating the
+  application, or changed later in the application settings.
+
+- `DENO_DEPLOY_BUILD_ID`: The ID of the currently running build.
+
+- `DENO_DEPLOYMENT_ID`: A unique identifier representing the entire
+  configuration set (application ID, build ID, context, environment variables,
+  cloud connections, database). Changes if any of these components change.
 
 More predefined variables will be added in the future.