host(bocchi): add logo for hydra

Changed files
+2
systems
bocchi
services
+2
systems/bocchi/services/hydra.nix
···
notificationSender = "hydra@services.soopy.moe";
smtpHost = "mail.soopy.moe";
+
logo = ./hydra.png;
+
extraConfig = ''
compress_build_logs 1
binary_cache_secret_key_file ${secrets.get "signing_key"}
systems/bocchi/services/hydra.png

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