Update instructions to link to existing

Author: amyrlam

DEPLOYING.md

@@ -20,10 +20,9 @@ branch," and select the branch you wish to deploy to staging.
 
 First, deploy the `master` branch to staging following the steps above, and check it over thoroughly. Get a second person to look it over too. There are many variables that could affect how an app displays in production compared to locally, particularly for this app.
 
-Never click the "promote to production" button on Heroku. We shouldn't promote from staging with this button because Heroku uses the same build from staging in the production container. This would mean that the variables set during ember builds get reused. Some of these variables have different values between staging and production, which leads to issues.
+**Never click the "promote to production" button on Heroku.** We shouldn't promote from staging with this button because Heroku uses the same build from staging in the production container. This would mean that the variables set during ember builds get reused. Some of these variables have different values between staging and production, which leads to issues.
 
-To deploy properly to production, click on the arrows for the `ember-api-docs` instance under Production,
-choose "Deploy a branch" and choose the branch name.
+To deploy properly to production, click on the arrows for the `ember-api-docs` instance under Production, choose "Deploy a branch" and choose the branch name.
 
 ### Rolling back to an earlier version
 

README.md

@@ -57,11 +57,7 @@ To run a11y tests, run `test_a11y=yes ember serve`
 * `yarn run lint:js`
 * `yarn run lint:js -- --fix`
 
-## Staging environment
-
-Latest changes from master can be seen on [ember-api-docs on Heroku](https://dashboard.heroku.com/pipelines/9368de86-caa5-4192-a96d-2ee22dc6ce71). You'll need access to Heroku via the Learning Team. In the "Staging" column, you can check out "Open app" under ember-api-docs-staging.
-
-## Deployment
+## Staging and Deployment
 
 See the [DEPLOYING.md](https://github.com/ember-learn/ember-api-docs/blob/master/DEPLOYING.md) guide for instructions.