Add pre-release action

.github/workflows/pre-release.yml

@@ -0,0 +1,33 @@
+name: Pre Release
+
+on:
+  workflow_run:
+    workflows: ["Build"]
+    branches: [main]
+    types: [completed]
+
+jobs:
+  pre-release:
+    runs-on: ubuntu-latest
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+
+    steps:
+      # Checkout repository and submodules
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+
+      - name: "Archive all"
+        run: |
+          python -m pip install --upgrade pip
+          pip install git-archive-all
+          git-archive-all --force-submodules --prefix=globalprotect-openconnect-latest/ ./globalprotect-openconnect_latest.orig.tar.gz
+
+      - uses: "marvinpinto/action-automatic-releases@latest"
+        with:
+          repo_token: "${{ secrets.GITHUB_TOKEN }}"
+          automatic_release_tag: "latest"
+          prerelease: true
+          title: "Development Build"
+          files: |
+            *.tar.gz