Bump alpine version

• Changed alpine version to 3.15 instead of always pushing latest

0.2.2

Changelog

4e82546 Merge pull request #3 from vouch-opensource/fix/io
1e2a287 bump version to 0.2.2
6f97c0b fix restarted container redirecting IO to /dev/null

0.2.1

Changelog

a87e43c Merge pull request #2 from vouch-opensource/docs
43bf9fd Rewording of documentation
34e0b5c add EPL license
614c02a add documentation
8583308 add metrics section and a few fixes
41ad5e9 change license from EPL to MIT
f8a6079 remove env argument

0.2

Changelog

b3bfeda Merge pull request #1 from vouch-opensource/init
824e574 add containerd module
c3f1232 add goreleaser definition
4368a81 add util functions and const defaults
9d214be change default http port and bump version
2f17a09 export health check and restart metrics
3c3455f fix docker-build make rule
808f14a fix makefile
2820b59 fix read config
b113d90 gosundheit check events logger implementation
e2bd185 health check implementation and read/parse config
6ae140f improve log messages
3ad0509 remove debug log messages
4dfdd11 update README