added image with c++ (#9) #69

Job	Run time
Build epicbox-haskell image	4m 44s
Build epicbox-go image	1m 48s
Build epicbox/debian image	47s
Build epicbox-clojure image	39s
Build epicbox-hyperskill/go image	1m 46s
Build epicbox-hyperskill/gradle image	2m 3s
Build epicbox-hyperskill/gradle-spring image	1m 30s
Build epicbox-hyperskill/java image	57s
Build epicbox-hyperskill/node image	3m 6s
Build epicbox/java11 image	40s
Build epicbox-hyperskill/node-javascript image	1m 23s
Build epicbox-hyperskill/python image	54s
Build epicbox/java17 image	44s
Build epicbox/java7 image	38s
Build epicbox/java8 image	38s
Build epicbox/kotlin image	45s
Build epicbox/node image	30s
Build epicbox/pmd image	40s
Build epicbox/php image	32s
Build epicbox/python 3.10 image	5m 34s
Build epicbox/python 3.11 image	5m 40s
Build epicbox/scala2 image	41s
Build epicbox/ruby image	1m 52s
Build epicbox/scala3 image	52s
Build epicbox/typescript image	44s
Build epicbox-gcc image	56s
Build epicbox/mono image	1m 17s
Build epicbox-hyperskill/gcc image	1m 31s
	43m 51s

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