Content type for static middleware
Content type for static middleware

Signed-off-by: Vishal Rana <54e88dfdee11a18f791b7188a9ffbcd1fdba30bd@labstack.com>

labstack/echo,gavv/echo,olliephillips/echo,coderhaoxin/echo,labstack/echo,o1egl/echo,gavv/echo,coderhaoxin/echo,CaptainCodeman/echo,CaptainCodeman/echo,o1egl/echo,mtojek/echo,olliephillips/echo,coderhaoxin/echo,caiqfrog/echo,mtojek/echo