chore: add docs github workflow

Author: knsd

.github/workflows/docs.yml

@@ -0,0 +1,32 @@
+name: Build docs
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  docs:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v1
+
+      - name: Install toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+
+      - name: Run cargo doc
+        uses: actions-rs/cargo@v1
+        with:
+          command: doc
+          args: -p daemonize
+
+      - name: Deploy docs
+        uses: JamesIves/[email protected]
+        with:
+          branch: gh-pages
+          folder: target/doc
+          single-commit: true