docker-compose.yml

version: '3'

services:
    spigot:
        build: docker/spigot
        container_name: spigot
        ports:
            - 45565:25565
        volumes:
            - ./app:/app:z

Dockerfile

FROM openjdk:8-jre-alpine

MAINTAINER Naoki Ikeguchi <siketyan@sikeserver.com>
ENV MINECRAFT_VERSION=1.13.2

RUN apk --update add curl git && \
    rm -rf /var/cache/apk/*

RUN mkdir -p /src && \
    mkdir -p /build && \
    mkdir -p /app

WORKDIR /src
RUN curl -L https://hub.spigotmc.org/jenkins/job/BuildTools/lastSuccessfulBuild/artifact/target/BuildTools.jar -o BuildTools.jar && \
    java -jar BuildTools.jar --rev ${MINECRAFT_VERSION} --output-dir /build && \
    rm -rf /src

WORKDIR /build
RUN mv /build/spigot-${MINECRAFT_VERSION}.jar /app/spigot.jar

RUN ls -al /app

WORKDIR /app
#CMD ["java", "-jar", "spigot.jar"]

VOLUME /app
RUN ls -al /app

EXPOSE 25565

tree.txt

/opt/minecraft
├── app
├── docker
│   └── spigot
│       ├── Dockerfile
│       └── start.sh
└── docker-compose.yml