Add donation info

DONATE.md

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+I'd gladly accept a donation.
+
+Here's how funds will be used:
+- paying for servers, of course
+- paying myself for my time. But it's not that important right now
+
+It's hard to estimate how I'm paying for the servers, because I'm just getting started.
+
+You can change your mind. You'll have to prove the transaction, and I'll refund only to the sending address.
+
+---
+
+#### Monero
+- Address: `4AvWDMdHkUWCFduLKc64DgDnwsKnSWq5PGvvNtezaiyE9yNCiGWso6uMFCjSp9VFzhDSegtopgyU7e2RQFgEPRBGNUCw5bt`
+- Secret view key: `b4367d329a2ae64fc7bdd2cb8e13bcd96e942f0e7a4080172a78bba1f6d6620a`
+
+#### Nano
+- Address: `nano_1sipyyzk6ses4sc5zpejpzr96wk3h8zpi1jke1egpkapne93aou4f1f6jnt7`
+
+#### Litecoin
+- MWEB: `ltcmweb1qqf70pwkda6phqywkgp99pqcqd06kuqf9yhe6nvpej793r2puvecf6qjqsz8v9adqj7ltwyk9usn0ekcjsgudd8qxf6afr6gmkgkx550vuc9ppqqc`
+- Normal: `ltc1q2m75mysj56rq0hxp563gme22k0p6tkpydf7kdt`
+
+#### Bitcoin:
+- Silent Payments: `sp1qq05zzca3edf4qlfa02fejku9g8pvvjlh2xsmst3f3ev2e2u7ldtzkq75mslgcakc5r0ekgdrxu3gmxehnm7degcwpa072xpc8p4kxg5ncqyd5vum`
+- Normal: `bc1phg8qs4y0e820pt8dw2xr4w9ah6y4343f963stenvjjssfxswdv4sdju50k`
+
+#### Ethereum (& tokens):
+- Address: `0xAe8c1211a49d2d86AA1D8a9115DF15Ba6adA8beC`
+
+#### SEPA:
+- Contact for details
+
+---
+
+If you want to use other crypto, contact me. Do not exchange, you'll lose some on fees.
+
+However much you donate, thank you. If you don't, thank you taking your time to read this at least.
+
+All updates of this file should be signed. You can verify that if you'd like.