feat: DOcker docs and docs redirect

Author: maamokun

README.md

@@ -20,6 +20,9 @@ A free instance is hosted at: [rssfetch.vercel.app](https://rssfetch.vercel.app)
 - This project can also be deployed to Cloudflare Workers, but requires some manual setup.
 - Follow the instructions in the [Elysia Cloudflare Workers documentation](https://elysiajs.com/integrations/cloudflare-worker.html).
 
+### Docker
+- Docker images are available on [GHCR](https://github.com/mikndotdev/rssfetch/pkgs/container/rssfetch).
+
 ## Manual Setup
 
 1. Install dependencies:

src/index.ts

@@ -1,4 +1,4 @@
-import { Elysia, t } from 'elysia';
+import {Elysia, redirect, t} from 'elysia';
 import { cors } from '@elysiajs/cors'
 import { XMLParser } from 'fast-xml-parser';
 
@@ -27,6 +27,11 @@ interface RSSFeed {
     };
 }
 
+app.onError(({ code, error }) => {
+    if (code === 'VALIDATION')
+        return redirect("https://docs.mikn.dev/solutions/developers/rssfetch/")
+})
+
 app.get('/', async ({ query, set }) => {
     try {
         const response = await fetch(query.url);