diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index 4e04606..0f6228f 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -1,6 +1,12 @@
 name: CI
 on:
   workflow_dispatch:
+    inputs:
+      push-docker-image-to-harbor:
+        description: 'Push Docker Image to Harbor'
+        type: boolean
+        default: false
+
   pull_request:
   push:
     branches:
@@ -82,12 +88,11 @@ jobs:
       run: nox -s safety
 
   docker:
-    # This job triggers only if all the other jobs succeed and does different things depending on the context.
-    # The job builds the Docker image in all cases and also pushes the image to Harbor only if something is
-    # pushed to the main branch.
     needs: [tests, linting, formatting, safety]
     name: Docker
     runs-on: ubuntu-20.04
+    env:
+      PUSH_DOCKER_IMAGE_TO_HARBOR: ${{ inputs.push-docker-image-to-harbor }}
     steps:
     - name: Check out repo
       uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.5.2
@@ -105,11 +110,11 @@ jobs:
       with:
         images: harbor.stfc.ac.uk/datagateway/scigateway-auth
 
-    - name: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' && 'Build and push Docker image to Harbor' || 'Build Docker image' }}
+    - name: ${{ fromJSON(env.PUSH_DOCKER_IMAGE_TO_HARBOR) && 'Build and push Docker image to Harbor' || 'Build Docker image' }}
       uses: docker/build-push-action@3b5e8027fcad23fda98b2e3ac259d8d67585f671 # v4.0.0
       with:
         context: .
-        push: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
+        push: ${{ fromJSON(env.PUSH_DOCKER_IMAGE_TO_HARBOR) }}
         tags: ${{ steps.meta.outputs.tags }}
         labels: ${{ steps.meta.outputs.labels }}
         target: prod