Added job to extract correct branch name

.github/workflows/image_build_push.yml

@@ -53,10 +53,25 @@ jobs:
           echo "Default branch: ${{ github.event.repository.default_branch }}"
           echo "Github event base ref: ${{ github.event.base_ref }}"
 
+  get-branch-name:
+    runs-on: ubuntu-latest
+
+    outputs:
+      branch_name: ${{ steps.get-branch-name.outputs.branch_name }}
+
+    steps:
+      - name: Remove prefix from branch name
+        id: get-branch-name
+        run: |
+          base_ref=${{ github.event.base_ref }}
+          echo "Branch name: branch_name=${base_ref#refs/heads/}"
+          echo "branch_name=${base_ref#refs/heads/}" >> "$GITHUB_OUTPUT"
+
   build: 
     if: ${{ !contains(github.event.head_commit.author.name, 'Github Actions bot to update .env with latest tags') }} 
+    needs: [get-branch-name]
     uses: MukuFlash03/e-mission-server/.github/workflows/reusable_image_build_push.yml@cleanup-cicd
     with:
       repo: ${{ github.event.repository.name }}
-      branch: ${{ github.ref_name }}
+      branch: ${{ needs.get-branch-name.outputs.branch_name }}
     secrets: inherit