Escape all build variables

Signed-off-by: tzununbekov <[email protected]>

Author: tzununbekov

buildtemplate.yaml

@@ -40,8 +40,8 @@ spec:
       cat <<EOF > Dockerfile
         FROM amazonlinux
 
-        RUN LATEST_VERSION=$(curl -sI https://github.com/triggermesh/aws-custom-runtime/releases/latest | grep "Location:" | awk -F "/" '{print $NF}' | tr -d "\r" ) \
-	        && curl -sL https://github.com/triggermesh/aws-custom-runtime/releases/download/${LATEST_VERSION}/aws-custom-runtime > /opt/aws-custom-runtime \
+        RUN LATEST_VERSION=\$(curl -sI https://github.com/triggermesh/aws-custom-runtime/releases/latest | grep "Location:" | awk -F "/" '{print \$NF}' | tr -d "\r" ) \
+	        && curl -sL https://github.com/triggermesh/aws-custom-runtime/releases/download/\${LATEST_VERSION}/aws-custom-runtime > /opt/aws-custom-runtime \
                 && chmod +x /opt/aws-custom-runtime
 
         ENV LAMBDA_TASK_ROOT "/opt"