Major revamp of shell init - drop bash support, focus on zsh

zsh/docker.zsh

@@ -0,0 +1,11 @@
+#
+# Docker Related
+#
+
+alias d="docker"
+alias dc="docker-compose"
+alias co="docker-compose"
+
+docker_remove_exited () {
+  docker rm $(docker ps -f="status=exited" -q)
+}