refactor: move app-release-template to monorepo

frontend/app-release-template/static/scripts/clone_app.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env sh
+
+# get semantical versioning string linke 2.0.0 (if $1 is v2.0.0) or $1
+DEFAULT_VERSION="0.0.0"
+APP_VERSION="${APP_VERSION:-$DEFAULT_VERSION}"
+
+if echo -n $1 | grep -Eq 'v[0-9]+\.[0-9]+\.[0-9]+'; then 
+  APP_VERSION=$(echo -n "$1" | cut -c 2-);
+else 
+  APP_VERSION=$1;
+fi
+
+if [ "$APP_VERSION" = "0.0.0" ]; then
+  echo "Unsupported app version was set!"
+  return 1
+fi
+
+git clone --depth 1 --branch $APP_VERSION https://gitlab.com/openstapps/app.git app