Use helm_apply and misc fixes

charts/ingress-nginx/deploy.sh

@@ -1,15 +1,14 @@
 #!/usr/bin/env bash
+TOP="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
 
 namespace=kube-system
 
 charts=()
 
+cd $TOP
 . ../config.sh
-kubectl_apply_files_files "${charts[@]}"
-helm template \
-    -n $namespace \
-    -f values.yaml \
-    ingress \
-    ingress-nginx/ingress-nginx \
-    | kubectl_apply_files $namespace
+
+kubectl_apply_files "${charts[@]}"
+
+helm_apply $namespace ingress ingress-nginx/ingress-nginx