fix(defaults): Change default image to reflect new jsii image tags (#…

…1127)

The 'latest' tag has been discontinued for the jsii/superchain image (documented [here](https://hub.docker.com/r/jsii/superchain)). This change updates the default image from 'latest' to the recommended replacement, '1-buster-slim'

Closes #1114 

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

lib/__tests__/expected.yml

@@ -996,7 +996,7 @@ Resources:
           - Name: DELIVLIB_ENV_TEST
             Type: PLAINTEXT
             Value: MAGIC_1924
-        Image: jsii/superchain:latest
+        Image: jsii/superchain:1-buster-slim
         ImagePullCredentialsType: SERVICE_ROLE
         PrivilegedMode: false
         Type: LINUX_CONTAINER
@@ -3707,7 +3707,7 @@ Resources:
         Type: NO_ARTIFACTS
       Environment:
         ComputeType: BUILD_GENERAL1_SMALL
-        Image: jsii/superchain:latest
+        Image: jsii/superchain:1-buster-slim
         ImagePullCredentialsType: SERVICE_ROLE
         PrivilegedMode: false
         Type: LINUX_CONTAINER
@@ -3837,7 +3837,7 @@ Resources:
         Type: NO_ARTIFACTS
       Environment:
         ComputeType: BUILD_GENERAL1_SMALL
-        Image: jsii/superchain:latest
+        Image: jsii/superchain:1-buster-slim
         ImagePullCredentialsType: SERVICE_ROLE
         PrivilegedMode: false
         Type: LINUX_CONTAINER

lib/build-env.ts

@@ -14,7 +14,7 @@ export function createBuildEnvironment(props: BuildEnvironmentProps) {
     computeType: props.computeType || cbuild.ComputeType.SMALL,
     privileged: props.privileged,
     environmentVariables: renderEnvironmentVariables({ ...props.environment, ...props.env }),
-    buildImage: props.buildImage || cbuild.LinuxBuildImage.fromDockerRegistry('jsii/superchain:latest'),
+    buildImage: props.buildImage || cbuild.LinuxBuildImage.fromDockerRegistry('jsii/superchain:1-buster-slim'),
   };
 
   return environment;