Add BOOTSTRAP_SCRIPT config option.

.github/workflows/ci-deb-packages-v2.yml

@@ -33,6 +33,11 @@ on:
         description: Default OS/Arch
         default: linux/amd64
         type: string
+      BOOTSTRAP_SCRIPT:
+        required: false
+        type: string
+        default: ''
+        description: Custom `sh` bootstrap script
       INSTALL_DEPENDENCIES:
         required: false
         type: boolean
@@ -78,6 +83,16 @@ jobs:
       with:
         fetch-depth: 0
 
+    - name: Run custom bootstrap script
+      shell: sh
+      run: |
+        if [ -n "${{ inputs.BOOTSTRAP_SCRIPT }}" ]; then
+          echo "Running provided script..."
+          echo "${{ inputs.BOOTSTRAP_SCRIPT }}" | sh
+        else
+          echo "No script was provided. Skipping execution."
+        fi
+
     - name: Generate DEBs based on ${{ inputs.BASE_IMAGE }}:${{ inputs.DISTRO_CODENAME }} for ${{ inputs.PLATFORM }}
       if: ${{ inputs.USE_CMAKE == false }}
       shell: sh