ci(docs): add GitHub Actions workflow and base path for automated GitHub Pages deployment

.github/workflows/deploy-docs.yml

@@ -0,0 +1,63 @@
+name: Deploy Documentation
+
+on:
+  push:
+    branches:
+      - master
+      - main
+    paths:
+      - 'docs/**'
+      - '.github/workflows/deploy-docs.yml'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+          cache-dependency-path: docs/package-lock.json
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v4
+
+      - name: Install documentation dependencies
+        run: npm ci
+        working-directory: docs
+
+      - name: Build VitePress documentation
+        run: npm run build
+        working-directory: docs
+
+      - name: Upload Pages artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: docs/.vitepress/dist
+
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

docs/.vitepress/config.ts

@@ -3,6 +3,7 @@ import { defineConfig } from 'vitepress';
 export default defineConfig({
   title: 'BetterCurseForge',
   description: 'Client mod for CurseForge Launcher',
+  base: process.env.BASE_URL || '/BetterCurseForge/',
   appearance: 'dark',
   lastUpdated: true,
   cleanUrls: true,