Fix Docker entrypoint #8

Job	Run time
package / prepare	6s
package / cross (aarch64-unknown-linux-musl)	52s
package / docker (linux/amd64, amd64, build)	46s
package / cross (arm-unknown-linux-musleabihf)	59s
package / pkg (rrdpit, ubuntu:focal, x86_64)	1m 7s
package / docker (linux/arm/v6, armv6, arm-unknown-linux-musleabihf, copy)	1m 37s
package / cross (armv7-unknown-linux-musleabihf)	1m 6s
package / pkg (rrdpit, ubuntu:jammy, x86_64)	1m 6s
package / docker (linux/arm/v7, armv7, armv7-unknown-linux-musleabihf, copy)	1m 20s
package / pkg (rrdpit, ubuntu:noble, x86_64)	1m 6s
package / docker (linux/arm64, arm64, aarch64-unknown-linux-musl, copy)	1m 19s
package / pkg (rrdpit, debian:buster, x86_64)	1m 22s
package / pkg (rrdpit, debian:bullseye, x86_64)	1m 23s
package / pkg (rrdpit, debian:bookworm, x86_64)	1m 17s
package / pkg-test (rrdpit, ubuntu:focal, fresh-install, x86_64)	1m 3s
package / pkg-test (rrdpit, ubuntu:jammy, fresh-install, x86_64)	46s
package / pkg-test (rrdpit, ubuntu:noble, fresh-install, x86_64)	45s
package / pkg-test (rrdpit, debian:buster, fresh-install, x86_64)	42s
package / pkg-test (rrdpit, debian:bullseye, fresh-install, x86_64)	55s
package / pkg-test (rrdpit, debian:bookworm, fresh-install, x86_64)	42s
package / docker-manifest	0s
	20m 19s

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