update readme

recipes/authorization.md

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+## Authorization
+
+The `createContext`-function is called for each incoming request so here you can add contextual information about the calling user from the request object. Learn more about authorization [here](https://trpc.io/docs/authorization).
+
+```ts
+// ~/server/trpc/index.ts
+import * as trpc from '@trpc/server'
+import type { CompatibilityEvent } from 'h3'
+import { decodeAndVerifyJwtToken } from '~/somewhere/in/your/app/utils'
+
+// The app's context - is generated for each incoming request
+export async function createContext({ req }: CompatibilityEvent) {
+  // Create your context based on the request object
+  // Will be available as `ctx` in all your resolvers
+
+  // This is just an example of something you'd might want to do in your ctx fn
+  async function getUserFromHeader() {
+    if (req.headers.authorization) {
+      const user = await decodeAndVerifyJwtToken(req.headers.authorization.split(' ')[1])
+      return user
+    }
+    return null
+  }
+  const user = await getUserFromHeader()
+
+  return {
+    user,
+  }
+}
+
+export const router = trpc
+  .router<inferAsyncReturnType<typeof createContext>>()
+  // open for anyone
+  .query('hello', {
+    input: z.string().nullish(),
+    resolve: ({ input, ctx }) => {
+      return `hello ${input ?? ctx.user?.name ?? 'world'}`
+    },
+  })
+  // checked in resolver
+  .query('secret', {
+    resolve: ({ ctx }) => {
+      if (!ctx.user)
+        throw new trpc.TRPCError({ code: 'UNAUTHORIZED' })
+
+      return {
+        secret: 'sauce',
+      }
+    },
+  })
+```

recipes/validation.md

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+## Validation
+
+tRPC works out-of-the-box with yup/superstruct/zod/myzod/custom validators. Learn more about input validation [here](https://trpc.io/docs/router#input-validation).
+
+```ts
+// ~/server/trpc/index.ts
+import { z } from 'zod'
+
+export const router = trpc
+  .router()
+  .mutation('createUser', {
+    // validate input with Zod
+    input: z.object({
+      name: z.string().min(5)
+    }),
+    async resolve(req) {
+      // use your ORM of choice
+      return await UserModel.create({
+        data: req.input,
+      })
+    },
+  })
+```