Build this Sources

You need JDK 11, Maven 3.6.x, Ant 1.9.x to build this sources

Open a command shell to the folder where you unzipped the archive
go into folder: build/poms launch the command:

mvn install

go into folder: community/logicaldoc/ launch the command:

mvn -Dmaven.test.skip=true install

on the subfolder: community/logicaldoc/logicaldoc-web/target you should find the .war archive containing the web application

For more instructions regarding maven installation or better workspace organization you can read the LogicalDOC Developer's Guide https://wiki.logicaldoc.com/wiki/Developer_Guide