twins-docker/Dockerfile

# Twins, a simple gemini server and reverse proxy
# @Author Twins: Trevor Slocum
# @Author Docker build: Aaron Fischer

# Build
FROM golang:1.16-alpine AS builder
RUN apk add --no-cache openssl patch git
WORKDIR /build
COPY ./localhost.cnf /build/localhost.cnf
RUN git clone https://code.rocketnine.space/tslocum/twins.git

RUN git config --global user.email "noname@example.com"
# Apply a needed patches
COPY ./path-10.patch /build/path-10.patch
RUN cd /build/twins && git am /build/path-10.patch
COPY ./activate-images-permanently.patch /build/activate-images-permanently.patch
RUN cd /build/twins && git am /build/activate-images-permanently.patch

RUN cd /build/twins && go build

RUN openssl req \
  -x509 \
  -out /build/localhost.crt \
  -keyout /build/localhost.key \
  -newkey rsa:2048 \
  -nodes \
  -sha256 \
  -subj '/CN=localhost' \
  -extensions EXT \
  -config /build/localhost.cnf

# Compress
FROM gruebel/upx:latest as upx
COPY --from=builder /build/twins/twins /app.org
RUN upx --best --lzma -o /app /app.org

# Final image
FROM alpine:3.13
WORKDIR /app
COPY --from=upx /app /app/twins
COPY ./twins.ini /app/config/twins.ini
COPY --from=builder /build/localhost.crt /app/certs/localhost.crt
COPY --from=builder /build/localhost.key /app/certs/localhost.key
EXPOSE 1965
CMD ["/app/twins", "-config", "/app/config/twins.ini"]