Include information about Lockers a way to subscribe Lockers.

[notthetup]

• Include information about Lockers subscription at Hackerspace in the Membership page (preferably with photos).
• Add Paypal subscription for big/small/tiny lockers 16/10/6 to the Membership page.

[miccheng]

+1

[valentine]

First point has already been documented in https://github.com/hackerspacesg/hackerspace.sg/pull/75 (though without photos).

[kaihendry]

This is done IIUC https://github.com/hackerspacesg/hackerspace.sg/commit/04a033a31367bd5273a02c9b4842a4ac92d7ad70