add semgrep

Author: Florencia Comuzzi

.github/workflows/semgrep.yml

@@ -0,0 +1,47 @@
+# Name of this GitHub Actions workflow.
+name: Semgrep
+
+on:
+  # Scan changed files in PRs (diff-aware scanning):
+  pull_request: {}
+  # Scan on-demand through GitHub Actions interface:
+  workflow_dispatch: {}
+  # Scan mainline branches if there are changes to .github/workflows/semgrep.yml:
+  push:
+    branches:
+      - main
+      - master
+    paths:
+      - .github/workflows/semgrep.yml
+  # Schedule the CI job (this method uses cron syntax):
+  schedule:
+    - cron: '20 17 * * *' # Sets Semgrep to scan every day at 17:20 UTC.
+    # It is recommended to change the schedule to a random time.
+
+permissions:
+  contents: read
+
+jobs:
+  semgrep:
+    # User definable name of this GitHub Actions job.
+    name: semgrep/ci
+    # If you are self-hosting, change the following `runs-on` value:
+    runs-on: ubuntu-latest
+
+    container:
+      # A Docker image with Semgrep installed. Do not change this.
+      image: semgrep/semgrep
+
+    # Skip any PR created by dependabot to avoid permission issues:
+    if: (github.actor != 'dependabot[bot]')
+
+    steps:
+      # Fetch project source with GitHub Actions Checkout. Use either v3 or v4.
+      - uses: actions/checkout@v4
+      # Run the "semgrep ci" command on the command line of the docker image.
+      - run: semgrep ci
+        env:
+          # Connect to Semgrep AppSec Platform through your SEMGREP_APP_TOKEN.
+          # Generate a token from Semgrep AppSec Platform > Settings
+          # and add it to your GitHub secrets.
+          SEMGREP_APP_TOKEN: ${{ secrets.SEMGREP_APP_TOKEN }}