Adding CI workflow

.github/workflows/build.yml

@@ -0,0 +1,23 @@
+name: Build C++
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  install:
+    runs_on: ubuntu-latest
+    steps:
+      -name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y -f build-essential g++ cmake
+  build:
+    needs: install
+    runs_on: ubuntu-latest
+    steps:
+      -uses: actions/checkout@v3
+      -name: Build project
+      run: g++ main.cpp -std=c++17 -o colorHex