Tweak README setup slightly

Author: alexcrichton

README.md

@@ -80,15 +80,15 @@ Next, configure `playbot.toml` copied from `playbot.toml.example`.
 Next, open up a screen window (`screen -R`), and spin up two sessions:
 
 ```
-cargo build --release --bin playpen && RUST_LOG=debug ./target/release/playpen 2>&1 | tee -a $HOME/playpen.log
+cargo build --release --bin playpen && RUST_LOG=debug ./target/release/playpen 0.0.0.0 2>&1 | logger -t playpen
 ```
 
 ```
-cargo build --release --bin playbot && RUST_LOG=debug ./target/release/playbot 2>&1 | tee -a $HOME/playbot.log
+cargo build --release --bin playbot && RUST_LOG=debug ./target/release/playbot 2>&1 | logger -t playbot
 ```
 
 Add a cron job to update the containers daily, currently:
 
 ```
-* 10 * * * sh -c 'cd $HOME/rust-playpen && sh docker/build.sh' &>> $HOME/build.log
+0 10 * * * cd $HOME/rust-playpen && sh docker/build.sh 2>&1 | logger -t playpen-update
 ```