Dockerfile

#
# MailHog Dockerfile
#

FROM golang:1.20-alpine as builder

# Install MailHog:
RUN apk --no-cache add --virtual build-dependencies \
  git \
  && mkdir -p /root/gocode \
  && export GOPATH=/root/gocode \
  && go install github.com/mailhog/MailHog@latest

FROM alpine:3
# Add mailhog user/group with uid/gid 1000.
# This is a workaround for boot2docker issue #581, see
# https://github.com/boot2docker/boot2docker/issues/581
RUN adduser -D -s /bin/false -H -S mailhog

COPY --from=builder /root/gocode/bin/MailHog /app/mailhog

USER mailhog

ENTRYPOINT ["/app/mailhog"]

# Expose the SMTP and HTTP ports:
EXPOSE 1025 8025