add flatcar-sync image

Author: tmacro

images/flatcar-sync/Dockerfile

@@ -0,0 +1,12 @@
+FROM python:3.12-alpine
+
+RUN apk add --no-cache gnupg \
+    && pip install --no-cache-dir requests boto3
+
+COPY --chmod=0444 flatcar.gpg /usr/local/share/flatcar.gpg
+
+# RUN gpg --batch --import /usr/local/share/flatcar.gpg
+
+COPY --chmod=0755 sync.py /usr/local/bin/sync.py
+
+ENTRYPOINT ["/usr/local/bin/sync.py"]