Implement a startup script which runs once on microservice start.

examples/simple.rs

@@ -18,8 +18,21 @@ fn process(
 	Ok(vec![(request, "case_a".to_string())])
 }
 
+fn startup(
+	_read_file: &ReadFileFn,
+	_write_file: &WriteFileFn,
+	_connection: &mut PgConnection,
+) -> Result<Vec<(u64, String)>, AnyError> {
+	Ok(Vec::new())
+}
+
 fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
-	let microservice = Microservice::new("simple-microservice", "sys-map.slingshot.cv", process);
+	let microservice = Microservice::new(
+		"simple-microservice",
+		"sys-map.slingshot.cv",
+		startup,
+		process,
+	);
 
 	microservice.start()?;
 	Ok(())