Readme.

README.md

@@ -4,8 +4,29 @@
 
 *Automatic:*
 
+You can click the button below to automatically deploy Snipt to Heroku.
+
 [![Deploy](https://www.herokucdn.com/deploy/button.svg)](https://heroku.com/deploy?template=https://github.com/nicksergeant/snipt/tree/heroku)
 
+*Please note:* this method will work fine, but you will not have email support
+unless you manually configure Postmark. You don't necessarily need this,
+though.  After deploying the instance, visit
+`https://<your-instance-name>/signup`, and create a user. You will get a 500
+Server Error, which is the site trying to send a welcome email. Ignore the
+error and go to `<https://your-instance-name>/login`, and log in with the
+username and password you provided. Snipt will work fine, but you will not
+receive any emails if there are server errors.
+
+If you would like to configure your instance to use a free Postmark addon, do
+the following after deploying:
+
+- `git clone https://github.com/nicksergeant/snipt.git`
+- `cd snipt`
+- `heroku git:remote -a <your-instance-name>`
+- `heroku addons:create postmark:10k`
+- `heroku addons:open postmark` -> use an email you control and confirm it
+- `heroku config:add POSTMARK_EMAIL=<email_from_above>`
+
 *Manual:*
 
 - Clone the repo.
@@ -13,7 +34,7 @@
 - `heroku addons:add heroku-postgresql:hobby-dev`
 - `heroku addons:add searchbox`
 - `heroku addons:create postmark:10k`
-- `heroku addons:open postmark` -> use an email you control
+- `heroku addons:open postmark` -> use an email you control and confirm it
 - `heroku config:add POSTMARK_EMAIL=<email_from_above>`
 - `heroku config:add SECRET_KEY=`
 - `git push heroku`