add workflow

Signed-off-by: Avinal Kumar <avinal.xlvii@gmail.com>

.github/workflows/build-deploy.yaml

@@ -0,0 +1,58 @@
+# Sample workflow for building and deploying a Hugo site to GitHub Pages
+name: Deploy Elm site to Pages
+
+on:
+  # Runs on pushes targeting the default branch
+  push:
+    branches: ["master"]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow one concurrent deployment
+concurrency:
+  group: "pages"
+  cancel-in-progress: true
+
+# Default to bash
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  # Build job
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download and install elm
+        run: |
+          curl -L -o elm.gz https://github.com/elm/compiler/releases/download/0.19.1/binary-for-linux-64-bit.gz
+          gunzip elm.gz
+          sudo mv elm /usr/bin/elm
+          sudo chmod +x /usr/bin/elm
+      - name: checkout
+        uses: actions/checkout@v3
+      - name: build
+        run: elm make src/Main.elm --output public/app.js --optimize
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v1
+        with:
+          path: public/
+
+  # Deployment job
+  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@v1