chore: upgrade alpine to "latest"

chronograf/1.10/alpine/Dockerfile

chronograf/1.6/alpine/Dockerfile

chronograf/1.7/alpine/Dockerfile

chronograf/1.8/alpine/Dockerfile

chronograf/1.9/alpine/Dockerfile

influxdb/1.10/data/alpine/Dockerfile

influxdb/1.10/meta/alpine/Dockerfile

influxdb/1.7/alpine/Dockerfile

influxdb/1.7/data/alpine/Dockerfile

influxdb/1.7/meta/alpine/Dockerfile

influxdb/1.8/alpine/Dockerfile

influxdb/1.8/data/alpine/Dockerfile

influxdb/1.8/meta/alpine/Dockerfile

influxdb/1.9/data/alpine/Dockerfile

influxdb/1.9/meta/alpine/Dockerfile

influxdb/2.0/alpine/Dockerfile

influxdb/2.1/alpine/Dockerfile

influxdb/2.2/alpine/Dockerfile

influxdb/2.3/alpine/Dockerfile

influxdb/2.4/alpine/Dockerfile