Fix typos

* certicate -> certificate
* stackoverflow -> Stack Overflow

docs/deployment/ssl-configuration.md

@@ -32,7 +32,7 @@ dokku certs:add < cert-key.tar
 
 The `certs:generate` command will walk you through the correct `openssl` commands to create a key, csr and a self-signed cert for a given app/domain. We automatically put the self-signed cert in place as well as add the specified domain to the application configuration.
 
-If you decide to obtain a CA signed certficate, you can import that certicate using the aformentioned `dokku certs:add` command.
+If you decide to obtain a CA signed certficate, you can import that certificate using the aformentioned `dokku certs:add` command.
 
 ### Certificate information
 

docs/getting-started/where-to-get-help.md

@@ -18,8 +18,8 @@ If you’re stumped, give us a holler in the Dokku IRC channel. Someone from the
 
 If [here](http://webchat.freenode.net/?channels=dokku) for a web-based client IRC client.
 
-## Stackoverflow
+## Stack Overflow
 
 http://stackoverflow.com/
 
-Tag your questions with `dokku` to enable existing users of stackoverflow to find your questions.
+Tag your questions with `dokku` to enable existing users of Stack Overflow to find your questions.