Update docker-compose installation

devops/aws/cloudformation/single-instance-docker.yml

@@ -89,6 +89,7 @@ Resources:
 
             # Update docker-compose to 1.28+
             curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
+            chmod +x /usr/local/bin/docker-compose
             ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose
 
             # Get latest cfn scripts and install them;