Update nginx:stable-alpine Docker digest to 4c945e2
Update nginx:stable-alpine Docker digest to 4c945e2

pmattmann/ecamp3,usu/ecamp3,pmattmann/ecamp3,pmattmann/ecamp3,ecamp/ecamp3,usu/ecamp3,usu/ecamp3,ecamp/ecamp3,ecamp/ecamp3,ecamp/ecamp3,pmattmann/ecamp3,usu/ecamp3