How to setup SSL with a rails app

So I have a ssl certification that I want to apply to my rails app. Im using puma on Heroku.

Chris Thanks as always.

I chris having a little problem. So I was following the Docs.

1. got the CSR from heroku
2. I got a godaddy cert ssl
3. Update the DNS (heres where im having problem.)

Standard Wildcard SSL from godaddy

CSR files
server.csr
.server.key
server.pass.key

heroku certs:info
Fetching SSL certificate hypsilophodon-49522 info for myapp done
Certificate details:
Common Name(s): *.myapp.com
                myapp.com
Expires At:     ...
Issuer:        ...Go Daddy Secure Certificate Authority - G2
Starts At:      ...
Subject:        /OU=Domain Control Validated/CN=*.myapp.com
SSL certificate is self signed.

heroku certs
Name                               Common Name(s)                  Expires               Trusted  Type
....-49522  *.myapp.com, myapp.com                         ...                        False    SNI

On my DNS Management
CNAME   *   myapp.herokuapp.com
CNAME   www hbquality.herokuapp.com

Your certificate *.myapp.com expires on ...
Ensure you've updated your DNS to reflect the new target name. See domain table below.

heroku panel settin
Domain Name DNS Target
*.myapp.com   wildcard.myapp.com.herokudns.com
myapp.com  myapp.com.herokudns.com
www.myapp.com www.myapp.com.herokudns.com

I think im doing some setup wrong.

UPDATE:
Godaddy Cname

www.myapp.com.herokudns.com
wildcard.myapp.com.herokudns.com

I'm not an expert on this stuff and I've only used their legacy SSL setup, so unfortunately I don't know that I have any advice for you on this one. Hopefully someone else can weigh in here for you or you can check with Heroku support on it!

Thank you, Chris as always for the quick reply.

Got it working Chris. Just redo same step and got it working. thank you.