Add initial (rough) database support

modd.conf

@@ -1,12 +1,12 @@
 @cert = $HOME/.ssh/hetty_cert.pem
 @key = $HOME/.ssh/hetty_key.pem
-@dev = false
+@db = hetty.bolt
 @addr = :8080
 
 **/*.go {
     daemon +sigterm: go run ./cmd/hetty \
         -cert=@cert \
         -key=@key \
-        -dev=@dev \
+        -db=@db \
         -addr=@addr
 }