How to copy all windmill artifacts from windmill base image?

Where would windmill artifacts be located if I want to manually copy them to my own docker image?

For example I am basing my image off of windmill

FROM ghcr.io/windmill-labs/windmill:latest

COPY . .
RUN ......
CMD

FROM ghcr.io/windmill-labs/windmill:latest

COPY . .
RUN ......
CMD

FROM ghcr.io/windmill-labs/windmill:latest

COPY . .
RUN ......
CMD

FROM ghcr.io/windmill-labs/windmill:latest

COPY . .
RUN ......
CMD

But I would like to something like this:

FROM ghcr.io/windmill-labs/windmill:latest as wmill
FROM other docker image
COPY # all windmill artifacts to image

COPY . .
RUN ......
CMD

FROM ghcr.io/windmill-labs/windmill:latest as wmill
FROM other docker image
COPY # all windmill artifacts to image

COPY . .
RUN ......
CMD

FROM ghcr.io/windmill-labs/windmill:latest as wmill
FROM other docker image
COPY # all windmill artifacts to image

COPY . .
RUN ......
CMD

FROM ghcr.io/windmill-labs/windmill:latest as wmill
FROM other docker image
COPY # all windmill artifacts to image

COPY . .
RUN ......
CMD