Update README.md

README.md

@@ -1,7 +1,11 @@
 # api-service
 
-This is a simple Express app hosted on an EC2 server used by peterwalker.xyz/bookapp to fetch the Google Books Api key it uses.
+This is a simple Express app hosted on an Amazon Linux 2 EC2 server used by peterwalker.xyz/bookapp to fetch the Google Books Api key it uses.
 
 peterwalker.xyz/bookapp fetches this api key by calling https://api.peterwalker.xyz/api/key.
 
 This is important because Single Page Applications expose any secrets they are built with.
+
+I use certbot to create the https certifications
+```sudo yum install -y certbot```
+```sudo certbot certonly --standalone -d api.peterwalker.xyz```