vaultwarden : image build only PostgreSQL (binary is 10MiB lighter)

podman-vaultwarden/ci_build-images.sh

@@ -12,7 +12,11 @@ buildfolder=/tmp/vaultwarden-$$
 if ! podman image exists ${vaultwarden_image}:${vaultwarden_version}; then
     mkdir ${buildfolder} &&
         if git clone --depth=1 --branch=${vaultwarden_version} https://github.com/dani-garcia/vaultwarden.git ${buildfolder}/ ; then 
-	TMPDIR=${HOME} podman image build -t ${vaultwarden_image}:${vaultwarden_version} -f ${buildfolder}/docker/amd64/Dockerfile.alpine ${buildfolder} || retval=false
+	    TMPDIR=${HOME} podman image build \
+		  -t ${vaultwarden_image}:${vaultwarden_version} \
+		  --build-arg DB=postgresql \
+		  -f ${buildfolder}/docker/amd64/Dockerfile.alpine \
+		  ${buildfolder} || retval=false
 	fi
     rm -rf ${buildfolder}
     podman image prune -a -f --filter dangling=true