Revert "CI: replace Docker-based armake2 with direct cargo install"

This reverts commit 110e7e9653.

.gitea/workflows/build.yml

@@ -16,20 +16,29 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Install armake2
-        run: cargo install armake2
-
       - name: Pack mission folder into PBO
-        run: armake2 pack "$PWD" "${{ env.PBO_NAME }}"
+        run: |
+          docker run --rm \
+            -v "${{ github.workspace }}:/workspace" \
+            -w /workspace \
+            arwynfr/armake2:debian \
+            pack \
+            /workspace \
+            "${{ env.PBO_NAME }}"
 
       - name: Verify PBO integrity
-        run: armake2 inspect "${{ env.PBO_NAME }}"
+        run: |
+          docker run --rm \
+            -v "${{ github.workspace }}:/workspace" \
+            -w /workspace \
+            arwynfr/armake2:debian \
+            inspect "${{ env.PBO_NAME }}"
 
       - name: Upload PBO as artifact
         uses: actions/upload-artifact@v4
         with:
           name: ${{ env.PBO_NAME }}
-          path: ${{ github.workspace }}/${{ env.PBO_NAME }}
+          path: ${{ env.PBO_NAME }}
 
   deploy:
     if: false