Can't connect to Docker container

I have a Node.js service built with Restify and I'm trying to use Docker to wrap it all up. My Dockerfile seems to work fine and my DB and Service boots and using docker exec I can curl REST endpoints just fine. However, the ports don't seem to get exposed. I'm on a Mac if that matters. Here's my Dockerfile:

FROM ubuntu:14.04
MAINTAINER Oscar Godson

RUN apt-get update
RUN apt-get install -y nodejs-legacy
RUN apt-get install -y npm
RUN apt-get install -y mysql-server
RUN apt-get install -y mysql-client

COPY . /src
WORKDIR /src

RUN cd /src;npm install

EXPOSE 4000

CMD ./bin/installer.sh

Here's installer.sh:

service mysql start
mysql -u root < ./bin/demo-data.sql
node index.js

Note: The MySQL DB is purely for testing and local dev. We use AWS RDS for production so thats why its using root access.

Now if I do:

docker run -p 4000:4000 86d57dae4522

And then:

curl http://localhost:4000/blah/ECC4E1D9-0E3C-4CE4-9D5B-2F2649A8F2FD

I get:

curl: (7) Failed to connect to localhost port 4000: Connection refused

If I do it within the container with exec like:

docker exec -i 86d57dae4522 curl http://localhost:4000/blah/ECC4E1D9-0E3C-4CE4-9D5B-2F2649A8F2FD

I get (this is expected since I havent logged into my service):

{"message":"You don't have permissions to do that"}

Within my Restify server I did 0.0.0.0 for the host too since I saw some comments about Rails apps needing to set that so I thought I'd try it in Node/Restify but no luck.:

server.listen(process.env.PORT || 4000, "0.0.0.0", function() {
  console.log('%s listening at %s', server.name, server.url);
});

I've also tried a friend suggestion of:

docker run --net="host" 7500cdb

And i read that --hostname puts the IP you pass it into the /etc/hosts so I tried (this is my computers IP)

docker run --hostname="192.168.2.6" 7500cdb

No luck with any of these. Any ideas?