diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..94479a3
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,23 @@
+name: Build
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+  push:
+    branches:
+      - main # or the name of your main branch
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - uses: sonarsource/sonarqube-scan-action@master
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+          SONAR_HOST_URL: ${{ secrets.SONAR_HOST_URL }}
+      - uses: sonarsource/sonarqube-quality-gate-action@master
+        timeout-minutes: 5
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
\ No newline at end of file
diff --git a/api/src/Average.php b/api/src/Average.php
index c887adf..b49a632 100644
--- a/api/src/Average.php
+++ b/api/src/Average.php
@@ -19,7 +19,9 @@ public function mean(array $numbers) {
      */
     public function median(array $numbers) {
         sort($numbers);
+
         $size = count($numbers);
+
         if ($size % 2) {
             return $numbers[$size / 2];
         } else {
diff --git a/core/src/Average.php b/core/src/Average.php
index 862bf04..6494dfa 100644
--- a/core/src/Average.php
+++ b/core/src/Average.php
@@ -19,7 +19,9 @@ public function mean(array $numbers) {
      */
     public function median(array $numbers) {
         sort($numbers);
+
         $size = count($numbers);
+
         if ($size % 2) {
             return $numbers[$size / 2];
         } else {
diff --git a/sonar-project.properties b/sonar-project.properties
new file mode 100644
index 0000000..5ecb89f
--- /dev/null
+++ b/sonar-project.properties
@@ -0,0 +1 @@
+sonar.projectKey=Github-Actions-Test
\ No newline at end of file