Fix SSL configuration paths

lib/gruf/configuration.rb

@@ -172,8 +172,9 @@ def reset
       self.hooks = ::Gruf::Hooks::Registry.new
       self.root_path = ::Rails.root.to_s.chomp('/') if defined?(::Rails)
       determine_loggers
-      self.ssl_crt_file = "#{root_path}config/ssl/#{environment}.crt"
-      self.ssl_key_file = "#{root_path}config/ssl/#{environment}.key"
+      ssl_path = root_path.to_s.empty? ? 'config/ssl' : "#{root_path}/config/ssl"
+      self.ssl_crt_file = "#{ssl_path}/#{environment}.crt"
+      self.ssl_key_file = "#{ssl_path}/#{environment}.key"
       cp = ::ENV.fetch('GRUF_CONTROLLERS_PATH', 'app/rpc').to_s
       self.controllers_path = root_path.to_s.empty? ? cp : "#{root_path}/#{cp}"
       self.backtrace_on_error = ::ENV.fetch('GRPC_BACKTRACE_ON_ERROR', 0).to_i.positive?

spec/gruf/configuration_spec.rb

@@ -34,6 +34,28 @@ class TestConfiguration
       obj.reset
       expect(subject).not_to eq 'test.dev'
     end
+
+    context 'when a Rails root path is configured' do
+      before do
+        stub_const('Rails', double(root: '/app/', logger: nil, env: 'production'))
+      end
+
+      it 'joins the SSL paths with the root path separator' do
+        obj.reset
+
+        expect(obj.ssl_crt_file).to eq '/app/config/ssl/production.crt'
+        expect(obj.ssl_key_file).to eq '/app/config/ssl/production.key'
+      end
+    end
+
+    context 'when no Rails root path is configured' do
+      it 'keeps the SSL paths relative' do
+        obj.reset
+
+        expect(obj.ssl_crt_file).to eq "config/ssl/#{obj.send(:environment)}.crt"
+        expect(obj.ssl_key_file).to eq "config/ssl/#{obj.send(:environment)}.key"
+      end
+    end
   end
 
   describe '.environment' do