refactor config, add Switch and Param struct + config labels

config/param.go

@@ -0,0 +1,33 @@
+package config
+
+var params = []*Param{
+	&Param{
+		key:   "dockerHost",
+		val:   getEnv("DOCKER_HOST", "unix:///var/run/docker.sock"),
+		label: "Docker API URL",
+	},
+	&Param{
+		key:   "filterStr",
+		val:   "",
+		label: "Container Name or ID Filter",
+	},
+	&Param{
+		key:   "sortField",
+		val:   "id",
+		label: "Container Sort Field",
+	},
+}
+
+type Param struct {
+	key   string
+	val   string
+	label string
+}
+
+// Return param value
+func Get(k string) string {
+	if _, ok := Global.params[k]; ok == true {
+		return Global.params[k].val
+	}
+	return ""
+}