node-mixin: Ignore jsonnetfile.lock.json and vendor folder
node-mixin: Ignore jsonnetfile.lock.json and vendor folder

Signed-off-by: Matthias Loibl <1d6e1cf70ec6f9ab28d3ea4b27a49a77654d370e@matthiasloibl.com>

prometheus/node_exporter,siavashs/node_exporter,siavashs/node_exporter,siavashs/node_exporter,prometheus/node_exporter,prometheus/node_exporter,siavashs/node_exporter