Add deploy workflow

.github/workflows/main.yml

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+# This is a basic workflow to help you get started with Actions
+
+name: Build and Deploy Hugo
+
+# Controls when the action will run. 
+on:
+  # Triggers the workflow on push or pull request events but only for the master branch
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+
+      # Runs a single command using the runners shell
+      - name: Hugo Build
+        uses: jakejarvis/hugo-build-action@v0.80.0
+
+      # Runs a set of commands using the runners shell
+      - name: FTP Deploy
+        uses: SamKirkland/FTP-Deploy-Action@4.0.0
+        with:
+          server: ${{ secrets.FTP_HOST }}
+          username: ${{ secrets.FTP_USERNAME }}
+          password: ${{ secrets.FTP_PASSWORD }}
+          port: 21
+          protocol: ftp
+          local-dir: ./public/