fix: readme

README.md

@@ -3,3 +3,65 @@
 # knative-microservice
 
 Create an express server with handlers from a folder registered for cloudevents from KNative Eventing, logging set up, and a shutdown function.
+
+## without persistence layer
+
+```js
+const { server, logger, onListen, shutdown } = await microservice({
+  handlers: {
+    path: "/handlers",
+    options: {
+      enableSyncSendToDenormalizer: true,
+      enableEventPublishing: true,
+    },
+  },
+  logger: pino(),
+});
+
+server.listen(port, onListen(port));
+process.on("SIGTERM", shutdown());
+```
+
+## with persistence layer
+
+```js
+const connectionOptions = {
+  type: "postgres" as const,
+  url: sourced.psql.url,
+  schema: sourced.psql.schema,
+  synchronize: sourced.psql.synchronize,
+  extra: {
+    ssl: {
+      rejectUnauthorized: sourced.psql.ssl.rejectUnauthorized,
+    },
+  },
+};
+
+logger.info({
+  msg: "⏳ connecting to psql",
+  sync: connectionOptions.synchronize,
+  schema: connectionOptions.schema,
+});
+try {
+  await persistenceLayer.connect(connectionOptions);
+} catch (error) {
+  logger.error({ msg: "🚨 Error connecting to psql", error });
+  process.exit(1);
+}
+logger.info("✅ connected to psql");
+
+const { server, shutdown, onListen } = await microservice({
+  handlers: {
+    path: handlersPath,
+    options: {
+      enableSyncSendToDenormalizer: config.enableSyncSendToDenormalizer,
+      enableEventPublishing: config.enableEventPublishing,
+    },
+  },
+  logger,
+});
+
+server.listen(port, onListen(port));
+
+process.on("SIGTERM", shutdown(persistenceLayer));
+```