use doc script from https://github.com/dnaka91/advent-of-code/blob/main/.github/workflows/docs.yml (they offered it on reddit) (#11)

Author: jadebenn

.github/workflows/docs.yml

@@ -0,0 +1,48 @@
+name: Docs
+on:
+  push:
+    branches: [main]
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+concurrency:
+  group: deploy
+  cancel-in-progress: false
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Setup Rust
+        uses: dtolnay/rust-toolchain@stable
+      - name: Configure cache
+        uses: Swatinem/rust-cache@v2
+      - name: Setup pages
+        id: pages
+        uses: actions/configure-pages@v5
+      - name: Clean docs folder
+        run: cargo clean --doc
+      - name: Build docs
+        run: cargo doc --no-deps
+      - name: Add redirect
+        run: echo '<meta http-equiv="refresh" content="0;url=aoc/index.html">' > target/doc/index.html
+      - name: Remove lock file
+        run: rm target/doc/.lock
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: target/doc
+  deploy:
+    name: Deploy
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4