## Directory Structure
```
app-root
  -> (src)
  -> docker-compose.yml
  -> scripts
    -> setupReplicaSet.sh
```

## Map Hostnames
Add the following to your `/etc/hosts` file in order to connect to the replica set locally
```
127.0.0.1   mongo1
127.0.0.1   mongo2
127.0.0.1   mongo3
```

## Start up
```bash
$ sudo chmod 755 ./scripts/setupReplicaSet.sh
$ sudo docker-compose.yml up -d
```

## Connection URI
Based on the hostnames and ports in the `docker-compose.yml` and `setupReplicaSet.sh` files 
```
mongodb://mongo1:27017,mongo2:27018,mongo3:27019/<DB-NAME-HERE>?replicaSet=rs0
```