feat: add CodeQL GitHub Actions workflow

.github/configs/codeql-config.yml

@@ -0,0 +1,5 @@
+name: "CodeQL config"
+
+paths-ignore:
+  # Ignore files from third-party packages, e.g. Swagger
+  - backend/python/app/static

.github/workflows/code-analysis.yml

@@ -0,0 +1,42 @@
+name: "Code Analysis"
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  schedule:
+    # Scheduled workflows run on the latest commit on the default or base branch.
+    # The shortest interval you can run scheduled workflows is once every 15 minutes.
+    #        ┌───────────── minute (0 - 59)
+    #        │ ┌───────────── hour (0 - 23)
+    #        │ │ ┌───────────── day of the month (1 - 31)
+    #        │ │ │ ┌───────────── month (1 - 12 or JAN-DEC)
+    #        │ │ │ │ ┌───────────── day of the week (0 - 6 or SUN-SAT)
+    #        │ │ │ │ │
+    #        │ │ │ │ │
+    #        │ │ │ │ │
+    #        * * * * *
+    - cron: '0 0 * * 0'
+
+jobs:
+  codeql-scan:
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v1
+        # CodeQL supports the following languages: go, javascript, csharp, python, cpp, java.
+        # Select javascript for typescript
+        with:
+          languages: javascript, python
+          config-file: ./.github/configs/codeql-config.yml
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v1