keep default getUrl expiry, add docs

Author: erquhart

README.md

@@ -263,7 +263,14 @@ export const list = query({
     return Promise.all(
       messages.map(async (message) => ({
         ...message,
-        imageUrl: await r2.getUrl(message.imageKey),
+        imageUrl: await r2.getUrl(
+          message.imageKey,
+          // Options object is optional, can be omitted
+          {
+            // Custom expiration time in seconds, default is 900 (15 minutes)
+            expiresIn: 60 * 60 * 24, // 1 day
+          }
+        ),
       }))
     );
   },

src/client/index.ts

@@ -145,11 +145,11 @@ export class R2 {
    *
    * @param key - The R2 object key.
    * @param options - Optional config object.
-   *   - `expiresIn` - The number of seconds until the URL expires (default: 3600, max: 604800 for 7 days).
+   *   - `expiresIn` - The number of seconds until the URL expires (default: 900, max: 604800 for 7 days).
    * @returns A promise that resolves to a signed URL for the object.
    */
   async getUrl(key: string, options: { expiresIn?: number } = {}) {
-    const { expiresIn = 3600 } = options;
+    const { expiresIn = 900 } = options;
     return await getSignedUrl(
       this.r2,
       new GetObjectCommand({ Bucket: this.config.bucket, Key: key }),