Create codeql.yml (#515)

* Create codeql.yml
* Update README.md

Author: KrzysztofPajak

.github/workflows/codeql.yml

@@ -0,0 +1,41 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  schedule:
+    - cron: '0 3 * * 1'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-22.04
+
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+  
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - language: csharp
+            build-mode: autobuild
+    
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
+          build-mode: ${{ matrix.build-mode }}
+          
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3
+        with:
+          category: "/language:${{matrix.language}}"

README.md

@@ -37,6 +37,7 @@ Advanced personalization, scalability, speed, and high efficiency - these are fe
 [![Build Status](https://dev.azure.com/grandnode/grandnode2/_apis/build/status/grandnode.grandnode2?branchName=main)](https://dev.azure.com/grandnode/grandnode2/_build/latest?definitionId=8&branchName=main)
 [![Docker Image CI](https://github.com/grandnode/grandnode2/actions/workflows/docker-image.yml/badge.svg)](https://github.com/grandnode/grandnode2/actions/workflows/docker-image.yml)
 ![License](https://img.shields.io/github/license/grandnode/grandnode2)
+[![CodeQL Advanced](https://github.com/grandnode/grandnode2/actions/workflows/codeql.yml/badge.svg)](https://github.com/grandnode/grandnode2/actions/workflows/codeql.yml)
 <a href="https://docs.grandnode.com/"><img src="https://img.shields.io/badge/Docs-docs.grandnode.com-brightgreen"></a>
 </div>