Switch Action to use node12

index.js

@@ -0,0 +1,13 @@
+const core = require('@actions/core');
+const exec = require('@actions/exec');
+
+async function run() {
+  try {
+    await exec.exec('sh', ['entrypoint.sh']);
+  }
+  catch (error) {
+    core.setFailed(error.message);
+  }
+}
+
+run()