This is my portal-ext configuration to avoid static resources being cached after a new deployment in Liferay DXP. Mainly used for development purpose.
com.liferay.portal.servlet.filters.cache.CacheFilter=false
com.liferay.portal.servlet.filters.etag.ETagFilter=false
com.liferay.portal.servlet.filters.header.HeaderFilter=false
com.liferay.portal.servlet.filters.themepreview.ThemePreviewFilter=true
theme.css.fast.load=false
layout.template.cache.enabled=false
browser.launcher.url=
freemarker.engine.resource.modification.check.interval=0
minifier.enabled=false