feat: add dynatrace plugin

Signed-off-by: Isaiah Thiessen <isaiah.thiessen@telus.com>

app-config.yaml

@@ -114,6 +114,10 @@ proxy:
     allowedHeaders: ['Authorization']
     headers:
       Authorization: Basic ${GOCD_AUTH_CREDENTIALS}
+  '/dynatrace':
+    target: https://your.dynatrace.instance.com/api/v2
+    headers:
+      Authorization: "Api-Token ${DYNATRACE_ACCESS_TOKEN}"
 
 organization:
   name: My Company
@@ -131,6 +135,9 @@ techdocs:
   publisher:
     type: 'local' # Alternatives - 'googleGcs' or 'awsS3' or 'azureBlobStorage' or 'openStackSwift'. Read documentation for using alternatives.
 
+dynatrace:
+  baseUrl: https://your-dynatrace-instance-here.dynatrace.com
+
 sentry:
   organization: my-company