Dockerfile for Foundry VTT

Dockerfile

# syntax = docker/dockerfile:1.1-experimental

FROM alpine:latest AS build
ARG FOUNDRY_VERSION

RUN apk add --update --no-cache --update curl

RUN --mount=type=secret,id=foundry \
  curl https://foundryvtt.com -c cookies.txt && \
  curl -v https://foundryvtt.com/auth/login/ -b cookies.txt -c cookies.txt \
    -H 'Referer: https://foundryvtt.com' \
    -d csrfmiddlewaretoken=$(cat cookies.txt | grep csrftoken | cut -d$'\t' -f7) \
    -d login_redirect='/' \
    -d login_username="$(cat /run/secrets/foundry | cut -d$'\t' -f1)" \
    -d login_password="$(cat /run/secrets/foundry | cut -d$'\t' -f2)" && \
  curl -b cookies.txt \
    -H 'Referer: https://foundryvtt.com' \
    -L "https://foundryvtt.com/releases/download?version=${FOUNDRY_VERSION}&platform=linux" \
    -o foundryvtt.zip

RUN mkdir /foundry && unzip foundryvtt.zip -d /foundry

FROM alpine:latest

RUN apk add --update --no-cache nodejs-current

RUN mkdir -p /opt/foundry /var/db/foundry
COPY --from=build /foundry/resources/app /opt/foundry

RUN adduser -h /nonexistant -g 'Foundry VTT' -s /sbin/nologin -D -H -u 101001 foundry
RUN chown foundry:foundry /var/db/foundry

EXPOSE 30000

USER foundry:foundry

ENTRYPOINT ["/usr/bin/node", "/opt/foundry/main.js", "--headless", "--noupdate", "--dataPath=/var/db/foundry"]