Update Dockerfile

1 job for master in 1 minute and 1 second (queued for 3 seconds)
Name Stage Failure
build-docker-master Build
fetch https://dl-cdn.alpinelinux.org/alpine/v3.14/main/x86_64/APKINDEX.tar.gz
fetch https://dl-cdn.alpinelinux.org/alpine/v3.14/community/x86_64/APKINDEX.tar.gz
v3.14.2-97-gc76656a60f [https://dl-cdn.alpinelinux.org/alpine/v3.14/main]
v3.14.2-98-g7c85ad6653 [https://dl-cdn.alpinelinux.org/alpine/v3.14/community]
OK: 14939 distinct packages available
ERROR: 'install' is not an apk command. See 'apk --help'.
The command '/bin/sh -c apk update && apk install git make gcc' returned a non-zero code: 1
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1