Nextcloud Deck

Fix #1613 (closed)

Only problem is: BUILD SUCCESSFUL in 12s 30 actionable tasks: 30 executed INFO: Successfully built version 0.0.1 of it.niedermann.nextcloud.deck ERROR: Could not build app it.niedermann.nextcloud.deck: Failed to find any output apks INFO: Finished INFO: 1 build failed

./build/it.niedermann.nextcloud.deck/app/build/outputs/apk/release/app-release-unsigned.apk

But I do already use latest fdroidserver from git.