Make env variables required

cmd/rove-server/internal/server.go

@@ -106,6 +106,9 @@ func (s *Server) Initialise(fillWorld bool) (err error) {
 	s.sync.Add(1)
 
 	// Connect to the accountant
+	if len(accountantAddress) == 0 {
+		log.Fatal("must set ACCOUNTANT_ADDRESS")
+	}
 	log.Printf("Dialing accountant on %s\n", accountantAddress)
 	s.clientConn, err = grpc.Dial(accountantAddress, grpc.WithInsecure())
 	if err != nil {

cmd/rove-server/main.go

@@ -35,6 +35,10 @@ func InnerMain() {
 		return
 	}
 
+	if len(address) == 0 {
+		log.Fatalf("Must set HOST_ADDRESS")
+	}
+
 	log.Printf("Initialising version %s...\n", version.Version)
 
 	// Set the persistence path