docs(): create code sharing docs

docs/collaboration.md

@@ -0,0 +1,29 @@
+# Collaboration
+
+You can use code server to collaborate with other developers in real time.
+
+## Code sharing using Duckly
+
+[Duckly](https://duckly.com/) allows you to share your code in real-time even with people using different IDEs (like JetBrains and VSCode).
+
+- Cross-IDE support,
+- Real-time typing,
+- P2P encrypted,
+- Voice and audio chat,
+- Terminal sharing
+
+### Installing the Duckly Extension
+
+Duckly uses an extension to provide real time sharing features
+
+1. Install the Duckly extension from OpenVSX on `code-server`.
+```bash
+SERVICE_URL=https://open-vsx.org/vscode/gallery \
+  ITEM_URL=https://open-vsx.org/vscode/item \
+  code-server --install-extension gitduck.code-streaming
+```
+2. Refresh you `code-server` window. You should now be able to see the Duckly extension.
+
+### Sharing with Duckly
+
+As `code-server` is based on VScode, you can follow the steps described on Duckly's [Pair programming with VS Code](https://duckly.com/tools/vscode) page and skip the installation step.

docs/manifest.json

@@ -49,6 +49,12 @@
         }
       ]
     },
+    {
+      "title": "Collaboration",
+      "description": "How to setup real time collaboration using code server.",
+      "icon": "<svg viewBox=\"0 0 16 16\" xmlns=\"http://www.w3.org/2000/svg\"><path d=\"M4 6H2v14c0 1.1.9 2 2 2h14v-2H4V6zm16-4H8c-1.1 0-2 .9-2 2v12c0 1.1.9 2 2 2h12c1.1 0 2-.9 2-2V4c0-1.1-.9-2-2-2zm0 10l-2.5-1.5L15 12V4h5v8z\"></path></svg>",
+      "path": "./collaboration.md"
+    },
     {
       "title": "Upgrade",
       "description": "How to upgrade code-server.",