remove some directives

rationale:
* EXPOSE 8000: it could be any port
* USER runner (&etc): you're not always gonna be running as uid 1000 (and you can specify with --user)

Dockerfile

@@ -12,8 +12,4 @@ RUN apt-get update && rm -rf /var/lib/apt/lists/*
 
 COPY --from=builder /usr/local/cargo/bin/breeze /usr/local/bin/breeze
 
-RUN useradd -m runner
-USER runner
-
-EXPOSE 8000
 CMD [ "breeze", "--config", "/etc/breeze.toml" ]