Dockerfile

# Docker build file for Inbucket: https://www.inbucket.org/

### Build frontend
# Due to no official elm compiler for arm; build frontend with amd64.
FROM --platform=linux/amd64 node:16 as frontend
WORKDIR /build
COPY . .
WORKDIR /build/ui
RUN rm -rf .parcel-cache dist elm-stuff node_modules
RUN yarn install --frozen-lockfile --non-interactive
RUN yarn run build

### Build backend
FROM golang:1.18-alpine3.16 as backend
RUN apk add --no-cache --virtual .build-deps g++ git make
WORKDIR /build
COPY . .
ENV CGO_ENABLED 0
RUN make clean deps
RUN go build -o inbucket \
  -ldflags "-X 'main.version=$(git describe --tags --always)' -X 'main.date=$(date -Iseconds)'" \
  -v ./cmd/inbucket

### Run in minimal image
FROM alpine:3.16
RUN apk --no-cache add tzdata
WORKDIR /opt/inbucket
RUN mkdir bin defaults ui
COPY --from=backend /build/inbucket bin
COPY --from=frontend /build/ui/dist ui
COPY etc/docker/defaults/greeting.html defaults
COPY etc/docker/defaults/start-inbucket.sh /

# Configuration
ENV INBUCKET_SMTP_DISCARDDOMAINS bitbucket.local
ENV INBUCKET_SMTP_TIMEOUT 30s
ENV INBUCKET_POP3_TIMEOUT 30s
ENV INBUCKET_WEB_GREETINGFILE /config/greeting.html
ENV INBUCKET_WEB_COOKIEAUTHKEY secret-inbucket-session-cookie-key
ENV INBUCKET_WEB_UIDIR=ui
ENV INBUCKET_STORAGE_TYPE file
ENV INBUCKET_STORAGE_PARAMS path:/storage
ENV INBUCKET_STORAGE_RETENTIONPERIOD 72h
ENV INBUCKET_STORAGE_MAILBOXMSGCAP 300

# Healthcheck
HEALTHCHECK --interval=5s --timeout=5s --retries=3 CMD /bin/sh -c 'wget localhost:$(echo ${INBUCKET_WEB_ADDR:-0.0.0.0:9000}|cut -d: -f2) -q -O - >/dev/null'

# Ports: SMTP, HTTP, POP3
EXPOSE 2500 9000 1100

# Persistent Volumes
VOLUME /config
VOLUME /storage

ENTRYPOINT ["/start-inbucket.sh"]
CMD ["-logjson"]