add abstract action

src/pack-utility.sh

@@ -79,9 +79,9 @@ uploadAppJson() {
   echo "$result" | jq .
 }
 
-purge() {
-  echo "Purging archives"
-  result=$(curl -sL -H "$header" -X POST "$apiRoot/release/api/admin/purge")
+action() {
+  echo "Running action $apiRoot/release/api/$@"
+  result=$(curl -sL -H "$header" "$apiRoot/release/api/$@")
   handleErrorMessage "$result"
   echo "$result" | jq .
 }