feat: client and server logic to manage announcements (#3)

### Explanation

_No response_

### Issue

_No response_

### Attestations

- [x] I have read and agree to the [Code of Conduct](https://docs.nhcarrigan.com/community/coc/)
- [x] I have read and agree to the [Community Guidelines](https://docs.nhcarrigan.com/community/guide/).
- [x] My contribution complies with the [Contributor Covenant](https://docs.nhcarrigan.com/dev/covenant/).

### Dependencies

- [x] I have pinned the dependencies to a specific patch version.

### Style

- [x] I have run the linter and resolved any errors.
- [x] My pull request uses an appropriate title, matching the conventional commit standards.
- [x] My scope of feat/fix/chore/etc. correctly matches the nature of changes in my pull request.

### Tests

- [ ] My contribution adds new code, and I have added tests to cover it.
- [ ] My contribution modifies existing code, and I have updated the tests to reflect these changes.
- [ ] All new and existing tests pass locally with my changes.
- [ ] Code coverage remains at or above the configured threshold.

### Documentation

_No response_

### Versioning

_No response_

Reviewed-on: #3
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

server/src/index.ts

@@ -4,25 +4,41 @@
  * @author Naomi Carrigan
  */
 
+import cors from "@fastify/cors";
 import fastify from "fastify";
+import { corsHook } from "./hooks/cors.js";
+import { ipHook } from "./hooks/ips.js";
+import { announcementRoutes } from "./routes/announcement.js";
+import { baseRoutes } from "./routes/base.js";
 import { logger } from "./utils/logger.js";
 
 const server = fastify({
   logger: false,
 });
 
-server.get("/", async(_request, reply) => {
-  reply.redirect("https://hikari.nhcarrigan.com");
+/**
+ * This needs to be first, to ensure all requests have CORS configured.
+ * Our CORS settings allow for any origin, because we have a custom hook
+ * that guards specific routes from CORS requests.
+ * This is to allow our uptime monitor to access the health check route, for example.
+ * @see routesWithoutCors.ts
+ */
+server.register(cors, {
+  origin: "*",
 });
 
-server.get("/health", async(_request, reply) => {
-  reply.status(200).send("OK~!");
-});
+server.addHook("preHandler", corsHook);
+server.addHook("preHandler", ipHook);
+
+server.register(baseRoutes);
+server.register(announcementRoutes);
 
 server.listen({ port: 20_000 }, (error) => {
   if (error) {
     void logger.error("instantiate server", error);
     return;
   }
-  void logger.log("debug", "Server listening on port 20000.");
+  if (process.env.NODE_ENV !== "dev") {
+    void logger.log("debug", "Server listening on port 20000.");
+  }
 });