Setup nightly Coverity scanning

Fix #1007.

Signed-off-by: Steven Bellock <sbellock@nvidia.com>

.github/workflows/coverity.yml

@@ -0,0 +1,35 @@
+# GitHub actions workflow.
+# https://docs.github.com/en/actions/learn-github-actions/workflow-syntax-for-github-actions
+
+# https://scan.coverity.com/projects/libspdm
+name: Coverity Scan
+
+on:
+    schedule:
+      - cron:  '00 8 * * *'
+    workflow_dispatch:
+
+jobs:
+  coverity:
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        cc: [gcc]
+    runs-on: ${{ matrix.os }}
+    env:
+      CC: ${{ matrix.cc }}
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+      with:
+        submodules: recursive
+
+    - name: CMake
+      run: |
+        cmake -DARCH=x64 -DTOOLCHAIN=GCC -DTARGET=Debug -DCRYPTO=mbedtls -B ${{github.workspace}}/build
+
+    - uses: vapier/coverity-scan-action@v1
+      with:
+        email: ${{ vars.COVERITY_SCAN_EMAIL }}
+        token: ${{ secrets.COVERITY_SCAN_TOKEN }}
+        command: make -C ${{github.workspace}}/build