Create bsky-handle.md

Setting up Bluesky custom handle with an is-a.dev subdomain guide.

Author: harys722

src/guides/bsky-handle.md

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+---
+icon: /media/bluesky.svg
+label: Bluesky Custom Handle
+tags: guides
+---
+
+# Setting up Bluesky custom handle with an is-a.dev subdomain
+
+## Get your verification string
+
+1. Open your Bluesky app and go to your profile **Settings**.
+
+   ![](../media/discord/step_1.png)
+
+2. Open the **Accounts** page.
+
+   ![](../media/bsky/step_2.png)
+
+3. Go to the **:icon-mention: Handle** settings.
+
+   ![](../media/bsky/step_3.png)
+
+4. Click on the "I have my own domain" button.
+
+   ![](../media/bsky/step_4.png)
+
+5. **Enter** your is-a.dev domain name in the text input and then **Copy** the TXT string. (e.g. `your-subdomain.is-a.dev`).
+
+   ![](../media/bsky/step_5.png)
+
+
+### Create your domain file
+
+Create a JSON file inside the `domains/` directory called `domains/_atproto.your-subdomain.json` with the following content and open a pull request:
+
+```json
+{
+    "owner": {
+        "username": "your-github-username"
+    },
+    "records": {
+        "TXT": "bsky-verification-string"
+    }
+}
+```
+
+> [!NOTE]
+> Don't forget the comma right above the `"records"` key!
+
+## Configuration
+
+After your pull request has been merged, repeat steps 1-5 and press the `Verify DNS Record` button.
+If it shows any error such as `Failed to verify handle. Please try again.`, try waiting a few minutes (sometimes up to 24 hours) as the DNS might not have propagated yet.