Merge pull request #256 from opendatacube/release-action

Add or clause to push to dockerhub section

Author: pindge

.github/workflows/main.yml

@@ -87,8 +87,8 @@ jobs:
     # Tag image if this is a tagged build
     # if not use a pseudo tag based on current tag,
     # number of commits since last tag and git hash
-    - name: Push to DockerHub (master branch only)
-      if: github.ref == 'refs/heads/master'
+    - name: Push to DockerHub (master branch or tagged release only)
+      if: github.ref == 'refs/heads/master' || github.ref == 'refs/tags/'
       run: |
         # figure out extra tag
         git fetch --prune --unshallow 2> /dev/null || true