fix: Use git command to get build SHA in health check

Author: trillium

backend/controllers/healthCheck.controller.js

@@ -1,9 +1,22 @@
+const { execSync } = require('child_process');
+
 const HealthCheckController = {};
 
+function getBuildInfo() {
+  try {
+    // Try to get git info from the container
+    const gitSha = execSync('git rev-parse --short HEAD 2>/dev/null || echo "unknown"', {
+      encoding: 'utf8',
+    }).trim();
+    return gitSha;
+  } catch {
+    return process.env.BUILD_SHA || 'unknown';
+  }
+}
+
 HealthCheckController.isAlive = (_, res) => {
-  res
-    .status(200)
-    .send(`I'm Alive! Build: ${process.env.BUILD_SHA || 'unknown'} - ${new Date().toISOString()}`);
+  const buildInfo = getBuildInfo();
+  res.status(200).send(`I'm Alive! Build: ${buildInfo} - ${new Date().toISOString()}`);
 };
 
 module.exports = HealthCheckController;