create builder for cyberchef and elasticvue based on respective masters
builders will build webapps and copy output to nginx html folder as tgz
some tweaking for elasticvue to properly load original favicon
with cyberchef now run as nginx webapp we gain another 40MB of RAM
while webapps will be built on AMD64 all final docker images can now be built as multi arch images for AMD64 and ARM64
