Add auto-linter action

.github/workflows/lint-fixer.yml

@@ -0,0 +1,32 @@
+name: "Let me lint:fix that for you"
+
+on: [push]
+
+jobs:
+  LMLFTFY:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out Git repository
+        uses: actions/checkout@v2
+      - name: Install Linter
+        run: |
+          npm install --ignore-scripts
+          cd frontend
+          npm install --ignore-scripts
+      - name: Fix everything which can be fixed
+        run: 'npm run lint:fix'
+      - uses: stefanzweifel/git-auto-commit-action@v4.0.0
+        with:
+          commit_message: "Auto-fix linting issues"
+
+          # Optional name of the branch the commit should be pushed to
+          # Required if Action is used in Workflow listening to the `pull_request` event
+          branch: ${{ github.head_ref }}
+
+          # Optional git params
+          commit_options: '--signoff'
+
+          # Optional commit user and author settings
+          commit_user_name: JuiceShopBot
+          commit_user_email: 61591748+JuiceShopBot@users.noreply.github.com
+          commit_author: JuiceShopBot <61591748+JuiceShopBot@users.noreply.github.com>