Minor fixes to let's encrypt environment

[ayushn21]

I ran into a couple of issues trying to deploy a Rack app using Falcon Virtual secured with a Let's Encrypt certificate.

1. The Falcon::Environment::TLS module needs to be separately included in addition to Falcon::Environment::LetsEncryptTLS.

service "service.example" do
  include Falcon::Environment::Rack
  include Falcon::Environment::TLS
  include Falcon::Environment::LetsEncryptTLS
end

I think this is a bit fiddly, and the docs don't mention this additional include anywhere. I've included the TLS module in the LetsEncryptTLS module so just a single include in the configuration is enough.

2. I got the following error after issuing the certificate:

OpenSSL::PKey::PKeyError: incorrect pkey type: id-ecPublicKey

I fixed this by adding the below line to my config:

ssl_private_key { OpenSSL::PKey.read(File.read(ssl_private_key_path)) }

This PR changes the TLS environment to use OpenSSL::PKey.read to fix this issue.

Types of Changes

• Bug fix.

Contribution

• I tested my changes locally.
• I agree to the Developer's Certificate of Origin 1.1.