BEWARE Using jre11-slim based tomcat breaks structure generation

[pcm32]

Moving the tomcat FROM container to :9-jre11-slim means that debian sid is used, which installs HMMER 3.2 instead of 3.1, which breaks the structure generation part with this error in the 2.0 release:

Caused by: java.lang.NumberFormatException: For input string: "N/A"
	at java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
	at java.base/java.lang.Integer.parseInt(Integer.java:638)
	at java.base/java.lang.Integer.parseInt(Integer.java:770)
	at uk.ac.ebi.cheminformatics.pks.parser.FeatureFileLine.<init>(FeatureFileLine.java:100)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
	at java.base/java.nio.file.FileChannelLinesSpliterator.forEachRemaining(FileChannelLinesSpliterator.java:114)