Merge pull request nextstrain#1027 from terrycojones/fix-intro-typo

Fixed trivial doc typo

docs-src/docs/server/introduction.md

@@ -26,7 +26,7 @@ Similarly, nextstrain.org is a server which has handlers for these three API end
 
 See [the server API](server/api.md) for details about each of these requests.
 
-> Note that "/charon" can be changed to any address you wich by customising the client at build time.
+> Note that "/charon" can be changed to any address you wish by customising the client at build time.
 See [the client-cusomisation API](../customise-client/api) for more details.
 
 ## The "Default" Auspice Server
@@ -59,4 +59,4 @@ Deploying to Heroku is straightforward, but there are a few points to note:
 1. You must set the config var `HOST` to `0.0.0.0` for the app.
 1. You will need to either create a `Procfile` or a `npm run start` script which calls `auspice view` (or `npx auspice view` depending on how you implement auspice)
 1. Make sure the datasets to be served are either (a) included in your git repo or (b) downloaded by the heroku build pipeline.
-[We use option (b)](https://github.com/nextstrain/auspice/blob/master/package.json) by specifing a npm script called `heroku-postbuild`.
+[We use option (b)](https://github.com/nextstrain/auspice/blob/master/package.json) by specifing a npm script called `heroku-postbuild`.