Docker build fails

[superrnovae]

Compiling netmuxd v0.1.4 (/work/netmuxd)
error[E0599]: no method named `browse_async` found for struct `AvahiMdnsBrowser` in the current scope
  --> src/mdns.rs:33:30
   |
33 |         let result = browser.browse_async().await;
   |                              ^^^^^^^^^^^^ method not found in `AvahiMdnsBrowser`

For more information about this error, try `rustc --explain E0599`.
error: could not compile `netmuxd` due to previous error
Error: building at STEP "RUN mkdir -p /output/     && cd netmuxd     && . "$HOME/.cargo/env"     && cargo build --release --features "zeroconf" --bin netmuxd     && cp target/release/netmuxd /output/netmuxd-zeroconf     && cargo build --release     && cp target/release/netmuxd /output/netmuxd-mdns": while running runtime: exit status 101

[biofreak]

Would like to push fix for this. But do not know how to get a contributor for this repo.