Set up MQTT broker

secrets/mqtt-receiver.age

@@ -0,0 +1,8 @@
+age-encryption.org/v1
+-> ssh-ed25519 iUaRGg JT+as1Cl66qOy5yY3WJNs0bh51DWaCe/+XZLR8m1L0A
+/6CyRX6Ks7Wr/ySlJhdfkabcy4N5rQ0VzGtlbxL8RCs
+-> L$l;-grease uU_g`a
+N00Z5C8AKzdnGZuFUHqY6uZBiMryyT3IXkdNlYW2fVJLOSfkfFdXssIK9hcMObyi
+sQENGphUf1Sk16Vo9p4emOL5mtzU
+--- flb9q0/Q608TJ6K9fsGULVwi2Pk860Cz750d5DBSfMM
+1<EFBFBD>%<25><>=<3D>Lڮ<4C><DAAE>s<EFBFBD>c/<2F>Iy<49><79>oT!<21>ڏ<EFBFBD>&X<0F><><EFBFBD>WՒZ̋<5A><CC8B><0E>8Z<38><5A><EFBFBD><EFBFBD><EFBFBD>æ<19><><EFBFBD><EFBFBD><06>	<09><0B>tw<74>'<27><> i<>e’<65>_<EFBFBD>}-<2D>V<EFBFBD>$<24>S<EFBFBD><53><EFBFBD><EFBFBD><EFBFBD>خA<D8AE><41><EFBFBD>h<EFBFBD><68><EFBFBD><04><>!<21><>9Z<39><5A><05><>hqіIa<49><61>,

secrets/secrets.nix

@@ -12,4 +12,6 @@ in {
   "dendrite.age".publicKeys = [ zion ];
   "dendrite-postgres.age".publicKeys = [ zion ];
   "telegram.age".publicKeys = [ zion ];
+  "mqtt-sender.age".publicKeys = [ zion ];
+  "mqtt-receiver.age".publicKeys = [ zion ];
 }