Add tests #16

Job	Run time
Lint Dockerfile	4s
Supported processor platforms	8s
Build linux/amd64 image	36s
Build linux/arm image	1m 2s
Build linux/arm64 image	1m 1s
Build linux/386 image	40s
Build linux/ppc64le image	59s
Build linux/riscv64 image	51s
Build linux/s390x image	1m 14s
Scan for vulnerabilities (linux/amd64)	18s
Scan for vulnerabilities (linux/arm)	19s
Scan for vulnerabilities (linux/arm64)	19s
Scan for vulnerabilities (linux/386)	19s
Scan for vulnerabilities (linux/ppc64le)	19s
Scan for vulnerabilities (linux/riscv64)	18s
Scan for vulnerabilities (linux/s390x)	19s
Test linux/amd64	15s
Test linux/arm	24s
Test linux/arm64	19s
Test linux/386	14s
Test linux/ppc64le	17s
Test linux/riscv64	18s
Test linux/s390x	25s
Push	0s
	10m 58s

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