feat: publish docker image alongside npm package (#197)

.gcp/publish-dry-run.yaml

@@ -1,11 +1,13 @@
 steps:
-  # Install dependencies
-  - name: 'node:bookworm'
+  - name: 'us-west1-docker.pkg.dev/gemini-code-dev/gemini-code-containers/gemini-code-builder'
     entrypoint: 'npm'
     args: ['install']
 
-  # Run prerelease versioning script across workspaces with dynamic version
-  - name: 'node:bookworm'
+  - name: 'us-west1-docker.pkg.dev/gemini-code-dev/gemini-code-containers/gemini-code-builder'
+    entrypoint: 'npm'
+    args: ['run', 'auth']
+
+  - name: 'us-west1-docker.pkg.dev/gemini-code-dev/gemini-code-containers/gemini-code-builder'
     entrypoint: 'npm'
     args:
       [
@@ -16,26 +18,13 @@ steps:
         '--suffix="$SHORT_SHA.$_REVISION"',
       ]
 
-  # Run prerelease dependency script across workspaces
-  - name: 'node:bookworm'
+  - name: 'us-west1-docker.pkg.dev/gemini-code-dev/gemini-code-containers/gemini-code-builder'
     entrypoint: 'npm'
     args: ['run', 'prerelease:deps', '--workspaces']
 
-  # Authenticate with our registry
-  - name: 'node:bookworm'
+  - name: 'us-west1-docker.pkg.dev/gemini-code-dev/gemini-code-containers/gemini-code-builder'
     entrypoint: 'npm'
-    args: ['run', 'auth:npm']
-
-  # Dry run publish to make sure that's not broken
-  # we awkwardly need to install rsync beforehand. TODO: use a dedicated dev container
-  - name: 'node:bookworm'
-    entrypoint: 'bash'
-    args:
-      - '-c'
-      - |
-        apt-get update -y
-        apt-get install -y rsync
-        npm publish --dry-run --tag=head --workspaces
+    args: ['publish', '--tag=head', '--dry-run', '--workspace=@gemini-code/cli']
 
 options:
   defaultLogsBucketBehavior: REGIONAL_USER_OWNED_BUCKET