fix(ci): improve health check for Charon container in nightly build

.github/workflows/nightly-build.yml

@@ -394,14 +394,28 @@ jobs:
             -p 8080:8080 \
             "${IMAGE_REF}"
 
-          # Wait for container to start
-          sleep 10
+          # Wait for container to become healthy
+          echo "⏳ Waiting for Charon to be healthy..."
+          MAX_ATTEMPTS=30
+          ATTEMPT=0
+          while [[ ${ATTEMPT} -lt ${MAX_ATTEMPTS} ]]; do
+            ATTEMPT=$((ATTEMPT + 1))
+            echo "Attempt ${ATTEMPT}/${MAX_ATTEMPTS}..."
+            if docker exec charon-nightly wget -qO- http://127.0.0.1:8080/health > /dev/null 2>&1; then
+              echo "✅ Charon is healthy!"
+              docker exec charon-nightly wget -qO- http://127.0.0.1:8080/health
+              break
+            fi
+            sleep 2
+          done
 
-          # Check container is running
-          docker ps | grep charon-nightly
-
-          # Basic health check
-          curl -f http://localhost:8080/health || exit 1
+          if [[ ${ATTEMPT} -ge ${MAX_ATTEMPTS} ]]; then
+            echo "❌ Health check failed after ${MAX_ATTEMPTS} attempts"
+            docker logs charon-nightly
+            docker stop charon-nightly
+            docker rm charon-nightly
+            exit 1
+          fi
 
           # Cleanup
           docker stop charon-nightly