minetest: add page (#2455)

pages/common/minetest.md

@@ -0,0 +1,20 @@
+# minetest
+
+> Multiplayer infinite-world block sandbox.
+> See also `minetestserver`, the server-only binary.
+
+- Start minetest in client mode:
+
+`minetest`
+
+- Start minetest in server mode:
+
+`minetest --server`
+
+- Write logs to a specific file:
+
+`minetest --logfile {{path/to/file}}`
+
+- Only write errors to the console:
+
+`minetest --quiet`