feat(docker): add non-root user, labels, and healthcheck (closes #433)

Now works with Pterodactyl.

.editorconfig

@@ -1,6 +1,8 @@
 root = true
 
 [*]
+indent_style = tab
+indent_size = 4
 end_of_line = lf
 insert_final_newline = true
 trim_trailing_whitespace = true