End of working. Everything still WIP

Dockerfile

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+FROM alpine
+
+LABEL org.opencontainers.image.authors="bluefox@privacynerd.de"
+
+
+WORKDIR /
+
+RUN apk update --no-cache && \
+    apk add --no-cache git && \
+    adduser -g cronuser -s /bin/sh -H -D cronuser && \
+    mkdir crond logs && \
+    touch logs/crond.log logs/puller.log && \
+    chown cronuser logs -R && \
+    echo $'#!/bin/sh\ncd /to-pull && git pull' > puller.sh && \
+    echo $'* * * * * cronuser /puller.sh\n' > crond/cronuser && \
+    chmod +x puller.sh
+
+ENTRYPOINT ["docker-entrypoint.sh"]
+CMD ["crond", "-f", "-c", "crond"]

docker-compose.yaml

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+services:
+  docker-cron-git-pull:
+    image: testing
+    volumes:
+      - ./logs:/logs

docker-entrypoint.sh

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+#!/bin/bash
+
+