Feature/add support for licensing server (#196)

* First take on adding support for sending in unity licensing server url on linux

* Forgot to build dist

* Moved services-config parsing to typescript

* Need to set licensing server env variable for activate.sh

* Forgot unused docker mount directory /resources

src/model/licensing-server-setup.ts

@@ -0,0 +1,20 @@
+import * as core from '@actions/core';
+import fs from 'fs';
+
+class LicensingServerSetup {
+  public static Setup(unityLicensingServer, actionFolder: string) {
+    const servicesConfigPath = `${actionFolder}/unity-config/services-config.json`;
+    const servicesConfigPathTemplate = `${servicesConfigPath}.template`;
+    if (!fs.existsSync(servicesConfigPathTemplate)) {
+      core.error(`Missing services config ${servicesConfigPathTemplate}`);
+
+      return;
+    }
+
+    let servicesConfig = fs.readFileSync(servicesConfigPathTemplate).toString();
+    servicesConfig = servicesConfig.replace('%URL%', unityLicensingServer);
+    fs.writeFileSync(servicesConfigPath, servicesConfig);
+  }
+}
+
+export default LicensingServerSetup;