feat: add robots.txt (#13)

* feat: add robots.txt

* chore: update deno task runner

Author: Yusuke4869

deno.json

@@ -1,7 +1,7 @@
 {
   "tasks": {
-    "start": "deno run --env --unstable-kv --allow-net --allow-env src/main.ts",
-    "dev": "deno run --watch --env --unstable-kv --allow-net --allow-env src/main.ts"
+    "start": "deno run --env --unstable-kv --allow-net --allow-env --allow-read src/main.ts",
+    "dev": "deno run --watch --env --unstable-kv --allow-net --allow-env --allow-read src/main.ts"
   },
   "imports": {
     "@hono/zod-validator": "npm:@hono/zod-validator@^0.2.2",

public/robots.txt

@@ -0,0 +1,2 @@
+User-Agent: *
+Disallow: /

src/routes/index.ts

@@ -1,4 +1,5 @@
 import { Hono } from "hono";
+import { serveStatic } from "hono/deno";
 
 import { home, redirect } from "../controllers/index.ts";
 import { sendAccessLog } from "../services/log.ts";
@@ -17,6 +18,7 @@ app.use(async (c, next) => {
     }
   }
 });
+app.use("/robots.txt", serveStatic({ path: "public/robots.txt" }));
 
 app.get("/", home);
 app.get("/:param", redirect);