Update main.workflow

.github/main.workflow

@@ -0,0 +1,9 @@
+workflow "build" {
+  resolves = ["GitHub Action for Docker"]
+  on = "check_run"
+}
+
+action "GitHub Action for Docker" {
+  uses = "actions/docker/cli@86ab5e854a74b50b7ed798a94d9b8ce175d8ba19"
+  runs = "docker build -t meedamian/bitcoind 0.17/"
+}