add docs.yml github workflow

.github/workflows/docs.yml

@@ -0,0 +1,52 @@
+name: Build and Deploy Rust API Docs
+
+on:
+  push:
+    branches:
+      - test-ci-docs   
+
+jobs:
+   docs:
+    name: build karyons rust api docs 
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+
+      - name: Get date for registry cache
+        id: date
+        run: echo "::set-output name=date::$(date +'%Y-%m-%d')"
+
+      - name: Cargo registry cache
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cargo/registry/index
+            ~/.cargo/registry/cache
+            ~/.cargo/git
+          key: ${{ runner.os }}-cargo-registry-${{ steps.date.outputs.date }}
+
+      - name: Rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+
+      - name: Build Documentation
+        uses: actions-rs/cargo@v1
+        with:
+          command: doc
+          args: --no-deps --all --document-private-items
+
+      - name: Deploy
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./target/doc
+          publish_branch: gh-pages 
+          force_orphan: true

.github/workflows/rust.yml

@@ -9,7 +9,7 @@ env:
 
 jobs:
   build_and_test:
-    name: Rust project - latest
+    name: karyons - latest
     runs-on: ubuntu-latest
     strategy:
       matrix: