docs(v2): remove npx and use github action to configure ssh key (#4263)

* docs(deployment): remove npx and fix github email

* refactor: use ssh configure action instead of own implementation

website/docs/deployment.mdx

@@ -183,25 +183,15 @@ jobs:
       - uses: actions/setup-node@v1
         with:
           node-version: '12.x'
-      - name: Add key to allow access to repository
-        env:
-          SSH_AUTH_SOCK: /tmp/ssh_agent.sock
-        run: |
-          mkdir -p ~/.ssh
-          ssh-keyscan github.com >> ~/.ssh/known_hosts
-          echo "${{ secrets.GH_PAGES_DEPLOY }}" > ~/.ssh/id_rsa
-          chmod 600 ~/.ssh/id_rsa
-          cat <<EOT >> ~/.ssh/config
-          Host github.com
-          HostName github.com
-          IdentityFile ~/.ssh/id_rsa
-          EOT
+      - uses: webfactory/ssh-agent@v0.5.0
+        with:
+          ssh-private-key: ${{ secrets.GH_PAGES_DEPLOY }}
       - name: Release to GitHub Pages
         env:
           USE_SSH: true
           GIT_USER: git
         run: |
-          git config --global user.email "actions@gihub.com"
+          git config --global user.email "actions@github.com"
           git config --global user.name "gh-actions"
           if [ -e yarn.lock ]; then
           yarn install --frozen-lockfile
@@ -210,7 +200,7 @@ jobs:
           else
           npm i
           fi
-          npx docusaurus deploy
+          npm run deploy
 ```
 
 1. Now when a new pull request arrives towards your repository in branch `documentation` it will automatically ensure that Docusaurus build is successful.