Add permissions to job

Signed-off-by: Fiachra Corcoran <fiachra.corcoran@est.tech>

Author: efiacor

.github/workflows/image-build-push-dev.yaml

@@ -34,6 +34,9 @@ jobs:
         (github.event.issue.pull_request && contains(github.event.comment.body, '/rebuild'))
       )
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
     strategy:
       fail-fast: false
       matrix: