ci: build docker images on push to main/development

[fengtality]

Summary

• Switch the docker buildx workflow trigger from pull_request: types: [closed] (merged-PR only) to push on main / development / core-2.6.
• Merged PRs already produce a push event on the base branch, so PR-merge builds keep working; direct pushes and locally-merged pushes to development now also rebuild hummingbot/gateway:development automatically.
• Step conditions updated from github.base_ref (only set on PR events) to github.ref.

Test plan

• After merge, push a commit to development and confirm the "Gateway Docker Buildx Workflow" run builds and pushes hummingbot/gateway:development.

🤖 Generated with Claude Code

[greptile-apps]

Greptile Summary

The workflow now builds Docker images on pushes to the release branches rather than only after merged pull requests.

• Triggers builds for pushes to main, development, and core-2.6.
• Uses branch refs to select the latest and development image tags.
• Retains the existing release-image workflow.

Confidence Score: 5/5

The PR appears safe to merge because no blocking failure remains within the eligible follow-up-review scope.

No blocking failure remains.

Important Files Changed

Filename	Overview
.github/workflows/docker_buildx_workflow.yml	Replaces the merged-pull-request build trigger with branch pushes and updates image-step conditions to inspect the pushed ref.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
  P[Push event] --> B{Branch}
  B -->|main| L[Build and push latest image]
  B -->|development| D[Build and push development image]
  B -->|core-2.6| N[No image build step]
  R[Release published or edited] --> V[Build and push versioned image]

Loading

_{Reviews (2): Last reviewed commit: "Merge branch 'development' into ci/docke..." | Re-trigger Greptile}