Create and push latest docker image during release (elastic#1848)

Author: reakaleek

.github/workflows/release.yml

@@ -99,14 +99,27 @@ jobs:
  with:
  name: build-distribution
  path: ./build
+ - id: setup-docker
+ name: Set up docker variables
+ run: |-
+ # version without v prefix (e.g. 1.2.3)
+ echo "tag=${GITHUB_REF_NAME/v/}" >> "${GITHUB_OUTPUT}"
+ echo "name=docker.elastic.co/observability/apm-agent-python" >> "${GITHUB_OUTPUT}"
  - name: Docker build
  run: >-
  docker build
- -t docker.elastic.co/observability/apm-agent-python:${GITHUB_REF_NAME/v/}
+ -t ${{ steps.setup-docker.outputs.name }}:${{ steps.setup-docker.outputs.tag }}
  --build-arg AGENT_DIR=./build/dist/package/python
  .
+ - name: Docker retag
+ run: >-
+ docker tag 
+ ${{ steps.setup-docker.outputs.name }}:${{ steps.setup-docker.outputs.tag }}
+ ${{ steps.setup-docker.outputs.name }}:latest
  - name: Docker push
- run: docker push docker.elastic.co/observability/apm-agent-python:${GITHUB_REF_NAME/v/}
+ run: |-
+ docker push ${{ steps.setup-docker.outputs.name }}:${{ steps.setup-docker.outputs.tag }}
+ docker push ${{ steps.setup-docker.outputs.name }}:latest
 
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