Add initial config for tower

secrets/chatterbox/nul.ie.signing.key.age

@@ -1,10 +1,9 @@
 age-encryption.org/v1
--> ssh-ed25519 ZB3e6Q iCLxItNihRG7KUDgcUm4vrtWQblN5hdYwvAegw0m5DQ
-nQSrxGdOaWjtjYssejOg1DoNRnIYNznRzDJUEcWCUgA
--> X25519 eE1k40fJ67VXFqUJ8pB2Ll8/s1K0kD3YkfMQnOqKiTw
-nH9+nHG8pAVLn5krLSNGc18FEMcp6o5NKkf/ciuFPY8
--> U|8z(Y7-grease n 6
-DNyQQUnKJ9kGTrZY0pj67eeuEMpyn69awH4v0+RZiS9GaVRNPz9dv6VfzI178NDv
-wb2gQLYc/5QFlvKo1pYx12AxxF3LvrwhNm8w9nvVjXUzFqn7SvoFxszxtw
---- bQBm6Njo6zu9+Xwao1BlMfBUXYL8TbytByW27Hde/Tg
-<EFBFBD><EFBFBD>v<EFBFBD><EFBFBD><EFBFBD>\<5C>'<27><>_<05><><EFBFBD><EFBFBD>H<EFBFBD><48><EFBFBD><EFBFBD><EFBFBD>(=a<><61>Jf<4A><66><16>+<2B><><EFBFBD>R<EFBFBD><1F><><EFBFBD><EFBFBD>,(<28><>+<2B><>W<EFBFBD>{?<02>Zn<5A>Q<EFBFBD><51>~<7E>a<EFBFBD>><3E><>)<29><><EFBFBD>gF<67><46>X<EFBFBD>rM4<4D><34>y<EFBFBD><79>
+-> ssh-ed25519 ZB3e6Q LYlElJVGV47nZ5AxrU6C8AfCrK3Br1DqMnozUVbzXAY
+DthCj922i2ud9PJrBtVpkF6Mvs0tG/xQViIZxNewI9Q
+-> X25519 D3YiBnszJ0a/e5VOVEonqGB7T0OWC7p7w3cNU7G3skc
+/IQOnNqHGu/nY1g6QijCr5mpfmGEs6SAGK9/jiOqtd4
+-> $Yg5VBMZ-grease XSfpS" k} (
+EPfUi7eQKyf8bB6C9PIvVieDte6X7IR54zhP+CcmAw
+--- KflE5p2fLkFzlQbOCpF/lZWO6Nq2m273tgE0/UqMeS4
+