Set org.opencontainers.image.source in Dockerfile

Author: MaxDesiatov

Dockerfile

@@ -2,6 +2,7 @@ FROM ghcr.io/swiftwasm/carton:0.12.1
 
 LABEL maintainer="SwiftWasm Maintainers <[email protected]>"
 LABEL Description="Docker Container for the SwiftWasm toolchain and SDK"
+LABEL org.opencontainers.image.source="https://github.com/swiftwasm/swiftwasm-action"
 
 RUN export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true && apt-get -q update && \
   apt-get -q install -y \