add the build version to container

Author: aptalca

Dockerfile

@@ -47,6 +47,7 @@ RUN \
     pip \
     wheel && \
   pip install --no-cache-dir --find-links https://wheel-index.linuxserver.io/ubuntu/ -r requirements.txt && \
+  printf "Linuxserver.io version: ${VERSION}\nBuild-date: ${BUILD_DATE}" > /build_version && \
   echo "**** cleanup ****" && \
   apt-get -y purge \
     build-essential \

Dockerfile.aarch64

@@ -47,6 +47,7 @@ RUN \
     pip \
     wheel && \
   pip install --no-cache-dir --find-links https://wheel-index.linuxserver.io/ubuntu/ -r requirements.txt && \
+  printf "Linuxserver.io version: ${VERSION}\nBuild-date: ${BUILD_DATE}" > /build_version && \
   echo "**** cleanup ****" && \
   apt-get -y purge \
     build-essential \