fixup! [process] added label to hello_world_host Dockerfile

Author: danbugs

chapter02/hello_world/Dockerfile

@@ -1,7 +1,5 @@
 FROM rust:latest AS builder
 
-LABEL org.opencontainers.image.source https://github.com/danbugs/serverside-wasm-book-code
-
 RUN USER=root cargo new --bin hello_world_host
 WORKDIR /hello_world_host
 

chapter02/hello_world/README.md

@@ -10,6 +10,7 @@ cargo build --target wasm32-unknown-unknown --release
 ## How to run the host?
 
 ```bash
+# from the `hello_world_guest/` directory
 docker run --rm -v "$(pwd):/data" danstaken/hello_world_host:latest  /data/hello_world_guest.wasm 'Dan'
 ```