update dockerignore to fix image build
update dockerignore to fix image build

R-Brain/codenvy,R-Brain/codenvy,codenvy/codenvy,R-Brain/codenvy,codenvy/codenvy,R-Brain/codenvy,codenvy/codenvy,codenvy/codenvy,codenvy/codenvy,R-Brain/codenvy,codenvy/codenvy,R-Brain/codenvy