fix: update PR preview comment logic to update existing comments

Author: Timeraa

.github/workflows/deploy-docs.yml

@@ -50,6 +50,10 @@ jobs:
       - name: Install dependencies
         run: cd docs && npm ci
 
+      - name: Set base path for PR preview
+        if: github.event_name == 'pull_request'
+        run: echo "VITEPRESS_BASE_PATH=/Activities/pr-preview/${{ github.event.pull_request.number }}" >> $GITHUB_ENV
+
       - name: Build with VitePress
         run: cd docs && npm run build
 
@@ -92,7 +96,8 @@ jobs:
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |
-            const body = `## 📝 Documentation Preview\n\n**Your documentation changes are ready for preview!**\n\n🔍 [View Preview](${process.env.DEPLOYMENT_URL})\n\n_This preview will be automatically updated when you push new commits to this PR._`;
+            const previewUrl = `${process.env.DEPLOYMENT_URL}/pr-preview/${context.issue.number}/`;
+            const body = `## 📝 Documentation Preview\n\n**Your documentation changes are ready for preview!**\n\n🔍 [View Preview](${previewUrl})\n\n_This preview will be automatically updated when you push new commits to this PR._`;
             github.rest.issues.createComment({
               issue_number: context.issue.number,
               owner: context.repo.owner,

docs/.vitepress/config.ts

@@ -1,3 +1,4 @@
+import process from 'node:process'
 import { defineConfig } from 'vitepress'
 
 // Define available versions
@@ -12,8 +13,11 @@ const versions: VersionItem[] = [
   { text: 'v2 (Coming Soon)', link: '#', disabled: true },
 ]
 
+// Get base path from environment variable or use default
+const basePath = process.env.VITEPRESS_BASE_PATH || '/Activities'
+
 export default defineConfig({
-  base: '/Activities',
+  base: basePath,
   title: 'PreMiD',
   description: 'Documentation for developing PreMiD Activities',
   themeConfig: {