Bump node from 18.17.1-alpine to 21.7.1-alpine in /epicbox-node #143

Job	Run time
Build epicbox-clojure image	20s
Build epicbox/debian image	23s
Build epicbox-haskell image	20s
Build epicbox-go image	23s
Build epicbox-hyperskill/go image	29s
Build epicbox-hyperskill/gradle image	23s
Build epicbox-hyperskill/gradle-spring image	1s
Build epicbox-hyperskill/java image	23s
Build epicbox-hyperskill/node image	20s
Build epicbox-hyperskill/node-javascript image	22s
Build epicbox-hyperskill/python image	1s
Build epicbox/java11 image	21s
Build epicbox/java17 image	21s
Build epicbox/java7 image	1s
Build epicbox/java8 image	19s
Build epicbox/kotlin image	19s
Build epicbox/node image	19s
Build epicbox/php image	20s
Build epicbox/pmd image	20s
Build epicbox/python 3.10 image	19s
Build epicbox/ruby image	19s
Build epicbox/python 3.11 image	19s
Build epicbox/scala2 image	19s
Build epicbox/scala3 image	19s
Build epicbox/typescript image	19s
Build epicbox-gcc image	0s
Build epicbox-hyperskill/gcc image	0s
Build epicbox/mono image	0s
Clean untagged images	0s
	7m 39s

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