Add Docker Labels to Container Metadata

[madhathacker]

Description

Overview
I would like to request the ability to pull a containers stack name from its labels (along with all the other labels). When using docker inspect, this value can be found in .config.labels["com.docker.compose.project"].

Related Previous ticket: #798

Current Behavior
Currently the container.go code utilizes the docker package to pull limited default metadata for a container, as described in the projects documentation.

Requested Behavior
Update the function to include the container's labels from its summary, as defined in the docker go package. It is an array of strings.