development:
  rpc_host: localhost
  rpc_port: 8101
  rpc_whitelist: "*"
  minerthreads: 1
  genesis_block: config/genesis/dev_genesis.json
  datadir: /tmp/embark
  chains: config/chains/development.json
  mine_when_needed: true
  max_peers: 0
  gas_limit: 500000
  gas_price: 10000000000000
  console: false
  account:
    init: true
    password: config/password
    num: 1
staging:
  rpc_host: localhost
  rpc_port: 8101
  rpc_whitelist: "*"
  datadir: default
  network_id: 0
  max_peers: 4
  console: true
  bootnodes: 
    boot: false
    enodes: [] #insert enode urls here. 
  account:
    init: false
    address:
production:
  rpc_host: localhost
  rpc_port: 8101
  rpc_whitelist: "*"
  datadir: default
  network_id: 1
  max_peers: 4
  console: true
  bootnodes: 
    boot: false
    enodes: []
  account:
    init: false
    address:

development:
  rpc_host: localhost
  rpc_port: 8101
  rpc_whitelist: "*"
  minerthreads: 1
  genesis_block: config/genesis/dev_genesis.json
  datadir: /tmp/embark
  chains: config/chains/development.json
  mine_when_needed: true
  max_peers: 0
  gas_limit: 500000
  gas_price: 10000000000000
  console: false
  account:
    init: true
    password: config/password
    num: 1
staging:
  rpc_host: localhost
  rpc_port: 8101
  rpc_whitelist: "*"
  datadir: default
  network_id: 0
  max_peers: 4
  console: true
  bootnodes: 
    boot: false
    enodes: [] #insert enode urls here. 
  nat: #NAT port mapping mechanism (any|none|upnp|pmp|extip:<IP>) 
  port: 30303
  account:
    init: false
    address:
production:
  rpc_host: localhost
  rpc_port: 8101
  rpc_whitelist: "*"
  datadir: default
  network_id: 1
  max_peers: 4
  console: true
  bootnodes: 
    boot: false
    enodes: []
  nat: #NAT port mapping mechanism (any|none|upnp|pmp|extip:<IP>) 
  port: 30303
  account:
    init: false
    address:

Put in NAT option in boilerplate
Put in NAT option in boilerplate
