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FROM openjdk:15
EXPOSE 80
# Heroku uses the PORT environment variable, it ignores EXPOSE.
# This also allows to specify a custom port when running the container even outside of Heroku.
ENV PORT 80
ARG JAR_FILE=build/libs/sw-server.jar
COPY ${JAR_FILE} app.jar
ENTRYPOINT ["java", "-Dserver.port=$PORT", "-jar", "/app.jar"]
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