update Dockerfile to use latest Tomcat 9.0 (no version bump)
@@ -25,7 +25,7 @@ RUN set -x \
# fastest, minimum build
&& mvn clean package -pl jspwiki-war,jspwiki-wikipages/en -am -DskipTests
-FROM tomcat:8.5
+FROM tomcat:9.0
COPY --from=package /tmp/jspwiki-war/target/JSPWiki.war /tmp
COPY --from=package /tmp/jspwiki-wikipages/en/target/jspwiki-wikipages-en-*.zip /tmp
