Local $KONG_IMAGE

[danielpoonwj]

Hi,

I noticed that pongo would always attempt to pull $KONG_IMAGE when provided. This throws an error when I'm trying to test against a custom Kong image that I have built locally but is not available on any remote registries.

Would it be possible to check and use the Kong image if present locally instead of pulling? Maybe something like this

docker images $KONG_IMAGE -q | wc -l