Using docker image sha256:6d1ef012b5674ad8a127ecfa9b5e6f5178d171b90ee462846974177fd9bdd39f for alpine:3.7 with digest alpine@sha256:8421d9a84432575381bfabd248f1eb56f3aa21d9d7cd2511583c68c9b7511d10 ...$ apk add --update npmfetch http://dl-cdn.alpinelinux.org/alpine/v3.7/main/x86_64/APKINDEX.tar.gzfetch http://dl-cdn.alpinelinux.org/alpine/v3.7/community/x86_64/APKINDEX.tar.gzERROR: unsatisfiable constraints: npm (missing): required by: world[npm]Cleaning up file based variablesERROR: Job failed: exit code 1