Make it up to date with heroku env variable and update packet the deploy won't success otherwise

[tanduong]

No description provided.

[haysclark]

@tanduong Looks like your fix doesn't work anymore. I still get this error when using your repo with the Heroku button.

      > [email protected] install /tmp/build_1a2f7399bc10f34af27cf56a5acff326/heroku-examples-node-articles-nlp-70867cc/node_modules/mongoose/node_modules/mongodb/node_modules/bson
       > (node-gyp rebuild 2> builderror.log) || (exit 0)
       
       make: Entering directory `/tmp/build_1a2f7399bc10f34af27cf56a5acff326/heroku-examples-node-articles-nlp-70867cc/node_modules/mongoose/node_modules/mongodb/node_modules/bson/build'
       CXX(target) Release/obj.target/bson/ext/bson.o
       SOLINK_MODULE(target) Release/obj.target/bson.node
       SOLINK_MODULE(target) Release/obj.target/bson.node: Finished
       COPY Release/bson.node
       make: Leaving directory `/tmp/build_1a2f7399bc10f34af27cf56a5acff326/heroku-examples-node-articles-nlp-70867cc/node_modules/mongoose/node_modules/mongodb/node_modules/bson/build'

[tanduong]

It doesn't seem to have errors. Can you run the app on your local? And be careful, running mongo will cost you money.