How to deploy SoapUI mock server on Heroku with Docker

Dockerfile

# Dockerfile for building a soapui-runner
FROM openjdk:8

ENV SOAPUI_VERSION="5.5.0" \
  SOAPUI="/opt/soapui" \
  PROJECT_FILE="/root/your-project.xml" \
  MOCKSERVICE_NAME="MockServiceName" \
  MOCK_BIN="mockservicerunner.sh"

RUN wget https://s3.amazonaws.com/downloads.eviware/soapuios/$SOAPUI_VERSION/SoapUI-$SOAPUI_VERSION-linux-bin.tar.gz && \
  tar -xzf SoapUI-5.5.0-linux-bin.tar.gz -C /opt/ && \
  mv /opt/SoapUI-5.5.0 /opt/soapui && \
  rm -f SoapUI-5.5.0-linux-bin.tar.gz

ENV PATH="$PATH:$SOAPUI/bin"
COPY your-project.xml /root/
COPY entrypoint.sh /

ENTRYPOINT ["/entrypoint.sh"]
CMD ["start"]

entrypoint.sh

#!/bin/bash

if [ "$1" = "start" ]; then
  $MOCK_BIN -Djava.awt.headless=true -Dfile.encoding=UTF8 -m "$MOCKSERVICE_NAME" -p "$PORT" $PROJECT_FILE
else
  exec $@
fi

heroku.yml

build:
  docker:
    web: Dockerfile