ci: Add F-Droid nightlies

.github/workflows/publish.yaml

@@ -87,6 +87,20 @@ jobs:
           path: packages/app/build/app/outputs/flutter-apk/app-x86_64-release-signed.apk
           if-no-files-found: error
 
+      - name: F-Droid nightly
+        run: |
+          cp packages/app/build/app/outputs/flutter-apk/app-arm64-v8a-release.apk app-arm64-v8a-debug.apk
+          cp packages/app/build/app/outputs/flutter-apk/app-armeabi-v7a-release.apk app-armeabi-v7a-debug.apk
+          cp packages/app/build/app/outputs/flutter-apk/app-x86_64-release.apk app-x86_64-debug.apk
+
+          sudo add-apt-repository ppa:fdroid/fdroidserver
+          sudo apt-get update
+          sudo apt-get install apksigner fdroidserver python3-pip --no-install-recommends
+          sudo apt-get purge fdroidserver
+          pip3 install https://gitlab.com/fdroid/fdroidserver/-/archive/master/fdroidserver.tar.gz
+          export DEBUG_KEYSTORE=${{ secrets.DEBUG_KEYSTORE }}
+          fdroid nightly -v --archive-older 10
+
   linux_x86_64:
     name: Linux x86_64
     runs-on: ubuntu-22.04