Add a Luacheck configuration file

.luacheckrc

@@ -0,0 +1,29 @@
+std = "lua51+minetest"
+unused_args = false
+allow_defined_top = true
+max_line_length = 90
+
+stds.minetest = {
+	read_globals = {
+		"DIR_DELIM",
+		"minetest",
+		"core",
+		"dump",
+		"vector",
+		"nodeupdate",
+		"VoxelManip",
+		"VoxelArea",
+		"PseudoRandom",
+		"ItemStack",
+		"default",
+		table = {
+			fields = {
+				"copy",
+			},
+		},
+	}
+}
+
+globals = {
+	"vector",
+}

init.lua

@@ -54,4 +54,3 @@ if minetest.setting_getbool("health_bars") ~= false and
 		minetest.after(1, add_HP_gauge, player:get_player_name())
 	end)
 end
-