Replicate most of drone-helm's config

README.md

@@ -4,5 +4,10 @@ TODO:
 
 * [x] Make a `.drone.yml` that's sufficient for building an image
 * [x] Make a `Dockerfile` that's sufficient for launching the built image
-* [ ] Make `cmd/drone-helm/main.go` actually invoke `helm`
+* [x] Make `cmd/drone-helm/main.go` actually invoke `helm`
+* [ ] Flesh out `helm upgrade` until it's capable of working
+* [ ] Implement `helm lint`
+* [ ] Implement `helm delete`
+* [ ] Implement all config settings
+* [ ] EKS support
 * [ ] Change `.drone.yml` to use a real docker registry