.github/worksflows: install composefs before testing

Closes #5

.github/workflows/rust.yml

@@ -12,9 +12,33 @@ env:
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
 
     steps:
+    - name: install composefs
+      run: |
+        (
+          sudo apt-get install fsverity
+          touch ~/xyz
+          fsverity enable ~/xyz || true
+          fsverity measure ~/xyz || true
+          sudo touch /abc
+          sudo fsverity enable /abc || true
+          sudo fsverity measure /abc || true
+          cat /proc/mounts
+          df ~
+          df
+
+
+          sudo apt-get install meson
+          git clone https://github.com/containers/composefs
+          cd composefs
+          meson setup _build
+          ninja -C _build
+          sudo ninja -C _build install
+          sudo ldconfig
+        )
+
     - uses: actions/checkout@v4
     - name: Build
       run: cargo build --verbose