diff --git a/.github/workflows/docker-build.yml b/.github/workflows/docker-build.yml
index 6275740..2fd8487 100644
--- a/.github/workflows/docker-build.yml
+++ b/.github/workflows/docker-build.yml
@@ -23,6 +23,29 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      # Points to a recent commit instead of `main` to avoid supply chain attacks. (The latest tag is very old.)
+      - name: 🎟 Get GitHub App token
+        uses: navikt/github-app-token-generator@a3831f44404199df32d8f39f7c0ad9bb8fa18b1c
+        id: get-token
+        with:
+          app-id: ${{ secrets.GH_APP_ID }}
+          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
+
+      - name: Delete workflow runs for current repo
+        uses: Mattraks/delete-workflow-runs@v2
+        with:
+          token: ${{ github.token }}
+          repository: ${{ github.repository }}
+          retain_days: 7
+          keep_minimum_runs: 6
+
+      - name: Delete deployment
+        uses: strumwolf/delete-deployment-environment@v2.3.0
+        with:
+          token: ${{ steps.get-token.outputs.token }}
+          environment: Preview
+          onlyRemoveDeployments: true
+        
       - name: Checkout repository
         uses: actions/checkout@v2
 
diff --git a/.gitignore b/.gitignore
index b0c2a54..328e87f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,3 +26,4 @@ logs
 # wrangler files
 .wrangler
 .dev.vars
+.vercel
\ No newline at end of file