FROM docker.io/alpine:3.21 AS builder

ENV VERSION=2.492.2
ENV SHA256_SUM=ae60fbd5f07ca4cd423a4737ed71f3b54ecf14666bb98a0cbff6a773540c2275
RUN wget -O jenkins.war https://get.jenkins.io/war-stable/$VERSION/jenkins.war 
RUN echo "$SHA256_SUM  jenkins.war" | sha256sum -c - || exit 1


FROM docker.io/alpine:3.21

RUN adduser -h /app -D -u 2222 jenkins
RUN apk --no-cache add \
  openjdk21 \
  fontconfig \
  font-dejavu

COPY --from=builder /jenkins.war /app/jenkins.war

USER jenkins
RUN mkdir /app/config

ENV JENKINS_HOME=/app/config
ENTRYPOINT ["java", "-jar", "/app/jenkins.war", "--httpPort=8080"]

EXPOSE 8080
VOLUME ["/app/config"]