FROM docker.io/alpine:3.21 AS builder

ENV VERSION=2.504.1
ENV SHA256_SUM=81026db18b0c4aad6b62cf408e4c42e5797661b41c517b37df606238e89b9df1
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"]