add packaging step on azure and refactor pipelines

deployment/build.debian

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+set -o errexit
+set -o xtrace
+
+# move to source directory
+pushd ${SOURCE_DIR}
+
+cp -a yarn.lock /tmp/yarn.lock
+
+# build deb
+dpkg-buildpackage -us -uc --pre-clean --post-clean
+
+mkdir -p ${ARTIFACT_DIR}
+mv ../jellyfin*.{deb,dsc,tar.gz,buildinfo,changes} ${ARTIFACT_DIR}
+
+cp -a /tmp/yarn.lock yarn.lock
+
+if [[ ${IS_DOCKER} == YES ]]; then
+  chown -Rc $(stat -c %u:%g ${ARTIFACT_DIR}) ${ARTIFACT_DIR}
+fi
+
+popd