Implement in upgrade guide

content/3.client/5.upgrade.md

@@ -1,8 +1,66 @@
 ---
-title: 'Upgrade guide'
+title: 'Update guide'
 ---
 
-# Upgrade guide
+# Keeping your instance synced
+
+Movie-web's github is constantly being updated. If you want to keep your instance synced to the most recent version, you will need to follow one of the two guides below.
+
+## Manual update
+
+You can manually update by typing the below lines into a terminal at the root of your instance
+
+```bash
+git remote add movie-web https://github.com/movie-web/movie-web.git
+git fetch movie-web
+# Change `dev` to `master` if you want a stable experience
+git merge movie-web/dev --allow-unrelated-histories
+git push -f # Force push to your origin main branch
+```
+
+## Automatic update
+
+You can also setup a scheduled workflow to automatically update your instance. This will allow you to keep your instance up to date without manual intervention.
+
+To do this, you will need to follow the guide below...
+
+1. Create a personal access token and add to repository's secret as `PAT`
+2. Paste the below file into your repository's root `/.github/workflows` directory
+
+```yaml
+# File: .github/workflows/repo-sync.yml
+name: Repo sync
+
+on:
+  schedule:
+  - cron:  "*/15 * * * *"
+  workflow_dispatch:
+
+jobs:
+  repo-sync:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        persist-credentials: false
+    - name: repo-sync
+      uses: repo-sync/github-sync@v2
+      with:
+        source_repo: "" # Change this to the repo you want to sync from
+        source_branch: "" # Change this to the branch you want to sync from
+        destination_branch: "" # Change this to the branch you want to sync to
+        github_token: ${{ secrets.PAT }}
+```
+::alert{type="info"}
+This workflow yaml file was taken from this [Github repository](https://github.com/repo-sync/github-sync).
+::
+
+3. Replace the source_repo, source_branch and destination_branch with the correct values for your repository.
+4. Commit and push the changes to your repository.
+
+Your instance should now be automatically updated to the latest version.
+
+# Upgrade version
 
 ## From `3.X` to `4.X`