FROM java:8-jre

ENV CATALINA_HOME /usr/local/tomcat
ENV PATH $CATALINA_HOME/bin:$PATH
RUN mkdir -p "$CATALINA_HOME"
WORKDIR $CATALINA_HOME

# see https://www.apache.org/dist/tomcat/tomcat-8/KEYS
RUN set -ex \
	&& for key in \
		05AB33110949707C93A279E3D3EFE6B686867BA6 \
		F7DA48BB64BCB84ECBA7EE6935CD23C10D498E23 \
	; do \
		gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; \
	done

ENV TOMCAT_MAJOR 8
ENV TOMCAT_VERSION 8.0.32
ENV TOMCAT_TGZ_URL https://www.apache.org/dist/tomcat/tomcat-$TOMCAT_MAJOR/v$TOMCAT_VERSION/bin/apache-tomcat-$TOMCAT_VERSION.tar.gz

RUN set -x \
	&& curl -fSL "$TOMCAT_TGZ_URL" -o tomcat.tar.gz \
	&& curl -fSL "$TOMCAT_TGZ_URL.asc" -o tomcat.tar.gz.asc \
	&& gpg --batch --verify tomcat.tar.gz.asc tomcat.tar.gz \
	&& tar -xvf tomcat.tar.gz --strip-components=1 \
	&& rm bin/*.bat \
	&& rm tomcat.tar.gz*

EXPOSE 8080
CMD ["catalina.sh", "run"]