Graphql-yoga: GraphQLServer.start miss a host argument

[superisaac]

I found no place to listen to specific ip address in the following line
```lang=javascript
combinedServer.listen(this.options.port, () => {

indeed the underline express server's listen method can accept the second parameter as the `host` to listen to, so adding a new option `host` for GraphQLServer.start() is appreciated, like this
```lang=javascript
combinedServer.listen(this.options.port, this.options.host, () => {

[schickling]

Would be great to have a PR adding the host configuration option! 🙏

[superisaac]

There are build issues even if I don't touch anything, due to which I cannot have a PR.

node_modules/@types/node/index.d.ts(167,14): error TS2687: All declarations of 'observable' must have identical modifiers.
node_modules/@types/zen-observable/index.d.ts(8,9): error TS2687: All declarations of 'observable' must have identical modifiers.
src/index.test.ts(53,11): error TS2459: Type 'string | AddressInfo' has no property 'port' and no string index signature.
src/index.ts(368,42): error TS2339: Property 'port' does not exist on type 'string | AddressInfo'.
  Property 'port' does not exist on type 'string'.
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! [email protected] build: `rm -rf dist && tsc -d`
npm ERR! Exit status 2
npm ERR! 
npm ERR! Failed at the [email protected] build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!    ~/.npm/_logs/2018-06-04T07_27_26_893Z-debug.log

[purplemana]

Is there any help required to get this merged? This feature is quite needed.

[stale[bot]]

Due to inactivity of this issue we have marked it stale. It will be closed if no further activity occurs.

[joealden]

Commenting to keep this open as it is a valid issue that should not be closed. It even has a PR, #399.

[epileftro85]

Is there a way to change localhost to any ip address?

[Odame]

I had to migrate to apollo-server because of this.

[stale[bot]]

Due to inactivity of this issue we have marked it stale. It will be closed if no further activity occurs.

[stale[bot]]

Hey :wave:, It seems like this issue has been inactive for some time. In need for maintaining clear overview of the issues concerning the latest version of graphql-yoga we'll close it.
Feel free to reopen it at any time if you believe we should futher discuss its content. :slightly_smiling_face:

[brenc]

Been reading through the Prisma docs all day. Was really excited to test this all out for a new GraphQL project we might be doing. Pulled down the example server and this is the very first issue I ran in to. I guess the workaround is to use something else?

[caelinsutch]

Is this still not resolved? Pretty critical feature...