protonmail-bridge-docker/build/Containerfile

FROM golang:1-trixie AS build

ARG version

# Install dependencies
RUN apt-get update && apt-get install -y golang build-essential libsecret-1-dev libfido2-dev libcbor-dev

# Build
ADD https://github.com/ProtonMail/proton-bridge.git#${version} /build/
WORKDIR /build/
RUN make build-nogui vault-editor

FROM debian:trixie-slim
LABEL maintainer="SR2 Communications <contact@sr2.uk>"

EXPOSE 25/tcp
EXPOSE 143/tcp

# Install dependencies and protonmail bridge
RUN apt-get update \
    && apt-get install -y --no-install-recommends socat pass libsecret-1-0 libfido2-1 libcbor0.10 ca-certificates adduser \
    && rm -rf /var/lib/apt/lists/*

# Create app user
RUN addgroup --gid 19994 protonmail && \
    adduser --uid 19994 --gid 19994 --shell /bin/bash --home /data protonmail

# Copy bash scripts
COPY --chown=19994:19994 gpgparams entrypoint.sh /protonmail/

# Copy protonmail
COPY --from=build --chown=19994:19994 /build/bridge /protonmail/
COPY --from=build --chown=19994:19994 /build/proton-bridge /protonmail/
COPY --from=build --chown=19994:19994 /build/vault-editor /protonmail/

WORKDIR /protonmail

USER 19994

ENTRYPOINT ["bash", "/protonmail/entrypoint.sh"]