createCoreRouter should have an option to add more routes in the same way as createCoreConroller has. Until then this may helps:
const { createCoreRouter } = require("@strapi/strapi").factories;
const defaultRouter = createCoreRouter("api::store.store");
const customRouter = (innerRouter, extraRoutes = []) => {
let routes;
return {
get prefix() {
return innerRouter.prefix;
},
get routes() {
if (!routes) routes = innerRouter.routes.concat(extraRoutes);
return routes;
},
};
};
const myExtraRoutes = [
{
method: "GET",
path: "/stores/key",
handler: "api::store.store.key",
},
{
method: "GET",
path: "/stores/moreStuff",
handler: "api::store.store.moreStuff",
},
];
module.exports = customRouter(defaultRouter, myExtraRoutes);
You can add customRouter to you own libs to reuse it.