Add github action config

.github/main.workflow

@@ -0,0 +1,25 @@
+workflow "Test & Cov" {
+  on = "push"
+  resolves = ["codecov"]
+}
+
+action "install" {
+  uses = "docker://node:alpine"
+  runs = "npm"
+  args = "ci"
+}
+
+action "test" {
+  needs = "npm ci"
+  uses = "docker://node:alpine"
+  runs = "npm"
+  args = "test"
+}
+
+action "codecov" {
+  needs = "npm test"
+  uses = "docker://node"
+  runs = "npx"
+  args = "codecov"
+  secrets = ["CODECOV_TOKEN"]
+}