First commit

Dockerfile

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+# === Dockerfile ===
+FROM postgres:17-alpine
+
+# Install Docker CLI + bash + core utilities
+RUN apk add --no-cache docker-cli bash coreutils
+
+# Create backup directory
+RUN mkdir -p /backups
+
+# Copy backup script
+COPY backup.sh /usr/local/bin/backup.sh
+RUN chmod +x /usr/local/bin/backup.sh
+
+# Use bash as default
+ENTRYPOINT ["/usr/local/bin/backup.sh"]
+