Change base image from Debian (Slim) to Alpine

This reduces the built image size from 69.2 MB to 5.58 MB.

Author: jdickey

Dockerfile

@@ -1,11 +1,11 @@
-FROM debian:stable-slim
+FROM alpine:3.10
 
 LABEL "name"="bash"
-LABEL "maintainer"="Jacob Lowe <jacoblowe2.0@gmail.com>"
-LABEL "version"="1.0.0"
+LABEL "maintainer"="Jeff Dickey <jdickey@seven-sigma.com>"
+LABEL "version"="1.1.0"
 
 LABEL "com.github.actions.name"="Bash for GitHub Actions"
-LABEL "com.github.actions.description"="Runs one or more commands in an Action"
+LABEL "com.github.actions.description"="Runs Bash commands in an Action"
 LABEL "com.github.actions.icon"="terminal"
 LABEL "com.github.actions.color"="gray-dark"