Add rust language

rust/1.56/Dockerfile

@@ -0,0 +1,14 @@
+FROM        --platform=$TARGETOS/$TARGETARCH rust:1.56-slim
+
+LABEL       author="Ethan Coward" maintainer="ethan.coward@icloud.com"
+
+RUN         apt update \
+                && apt -y install git dnsutils curl iproute2 ffmpeg \
+                && useradd -m -d /home/container container
+
+USER        container
+ENV         USER=container HOME=/home/container CARGO_HOME=/home/container/.cargo
+WORKDIR     /home/container
+
+COPY        ./../entrypoint.sh /entrypoint.sh
+CMD         ["/bin/bash", "/entrypoint.sh"]