Added oci labels

ci_container/Dockerfile

@@ -1,5 +1,12 @@
 FROM debian:latest
 
+LABEL org.opencontainers.image.created=${BUILDTIMESTAMP} \
+      org.opencontainers.image.authors="Heiko Reese <reese@kit.edu>" \
+      org.opencontainers.image.title="exim build container" \
+      org.opencontainers.image.description="A buld environment for exim-encrypt-dlfunc" \
+      org.opencontainers.image.source="https://git.scc.kit.edu/mail/exim-encrypt-dlfunc/" \
+      org.opencontainers.image.licenses="Apache-2.0"
+
 RUN apt-get update; \
     DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt-get install --no-install-recommends -y \
         build-essential \
@@ -21,9 +28,14 @@ RUN apt-get update; \
         gpgv1 \
         meson; \
     DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt-get install --no-install-recommends -y \
+        less \
+        mc \
+        openssh-client \
         vim; \
     DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt-get clean; \
     rm -rf /var/lib/apt/lists/*;
 
 RUN pip3 install --upgrade meson ninja; \
     rm -rf ~/.cache/pip/*;
+
+WORKDIR /mnt/

ci_container/build.sh

@@ -64,6 +64,7 @@ for i in "${images[@]}"; do
 		--format docker \
 		--iidfile "${IIDFILE}" \
 		--tag "${IMAGETAG}"
+		--build-arg BUILDTIMESTAMP="`date --iso-8601=seconds`"
 
 	if [ "${REGISTRY}" != "none" ]; then
 		echo "🚀 Pushing »${IMAGETAG}« to »${TARGET}«"