add dockerfile and ci

[crazy-max]

Adds Dockerfile and ci workflow.

Tests look broken:

$ docker buildx bake test
...
#14 4.007 === CONT  TestTitle
#14 4.007     load_test.go:187:
#14 4.007               Error Trace:    load_test.go:187
#14 4.007               Error:          Received unexpected error:
#14 4.007                               unexpected end of JSON input
#14 4.007               Test:           TestTitle
#14 4.007 --- FAIL: TestTitle (0.05s)
#14 4.007 === CONT  TestSingleArchManifest
#14 4.007     load_test.go:60:
#14 4.007               Error Trace:    load_test.go:60
#14 4.007               Error:          Received unexpected error:
#14 4.007                               unexpected end of JSON input
#14 4.007               Test:           TestSingleArchManifest
#14 4.007 --- FAIL: TestSingleArchManifest (0.05s)
#14 4.007 === CONT  TestMultiArchManifest
#14 4.007     load_test.go:136:
#14 4.007               Error Trace:    load_test.go:136
#14 4.007               Error:          Received unexpected error:
#14 4.007                               unexpected end of JSON input
#14 4.007               Test:           TestMultiArchManifest
#14 4.007 --- FAIL: TestMultiArchManifest (0.07s)
#14 4.007 FAIL
#14 4.007 coverage: 45.3% of statements
#14 4.007 FAIL  github.com/docker/go-imageinspect       0.073s
#14 4.007 ?     github.com/docker/go-imageinspect/cmd/imageinspect      [no test files]
#14 4.007 ?     github.com/docker/go-imageinspect/testutil      [no test files]
#14 4.007 FAIL

cc @tonistiigi

[tonistiigi]

Fixed version https://github.com/docker/go-imageinspect/compare/main...tonistiigi:go-imageinspect:dockerfile-ci?expand=1 . Couldn't push to your branch.

[crazy-max]

@tonistiigi Looks good 👍

#12 [test 1/1] RUN --mount=type=bind,target=.     --mount=type=cache,target=/root/.cache     --mount=type=cache,target=/go/pkg/mod     go test -v -coverprofile=/tmp/coverage.txt -covermode=atomic ./...
#12 0.752 === RUN   TestSingleArchManifest
#12 0.752 === PAUSE TestSingleArchManifest
#12 0.752 === RUN   TestMultiArchManifest
#12 0.752 === PAUSE TestMultiArchManifest
#12 0.752 === RUN   TestTitle
#12 0.752 === PAUSE TestTitle
#12 0.752 === CONT  TestSingleArchManifest
#12 0.752 === CONT  TestTitle
#12 0.752 === CONT  TestMultiArchManifest
#12 0.752 === CONT  TestSingleArchManifest
#12 0.752     env.go:70: added blob sha256:cb35deae8cc30d76dd2a80eb21327c63f205ba8f2948df7eb3e57dfbab6d198f
#12 0.752 === CONT  TestTitle
#12 0.752     env.go:70: added blob sha256:58cc9abebfec4b5ee95157d060207f7bc302516e6d84a0d83a560a1f7ed00e6e
#12 0.752 === CONT  TestMultiArchManifest
#12 0.752     env.go:70: added blob sha256:cb35deae8cc30d76dd2a80eb21327c63f205ba8f2948df7eb3e57dfbab6d198f
#12 0.752 === CONT  TestTitle
#12 0.752     env.go:70: added blob sha256:01c3c614c2b014227e03b5ddbb8ac09fec66512b6490c457b8ca710513b076f4
#12 0.752     env.go:82: added tag docker.io/library/test:latest -> sha256:01c3c614c2b014227e03b5ddbb8ac09fec66512b6490c457b8ca710513b076f4
#12 0.752 === CONT  TestMultiArchManifest
#12 0.752     env.go:70: added blob sha256:ae835ab97611eb5f667503bb7ea928c01a8e5caea7bae2912e57742dcd9655c4
#12 0.752     env.go:70: added blob sha256:58cc9abebfec4b5ee95157d060207f7bc302516e6d84a0d83a560a1f7ed00e6e
#12 0.752     env.go:70: added blob sha256:2ca63b2f6cd33ff117e9ec5f48cd62e0bfc5f2fcf323e7e785b7cbb6c12eb502
#12 0.752 === CONT  TestSingleArchManifest
#12 0.752     env.go:70: added blob sha256:a5ce1ee5b87909d1a85a2df86a8c5880ee2b0a8553eac2b0a300bec0e2f20920
#12 0.752     env.go:82: added tag docker.io/library/test:latest -> sha256:a5ce1ee5b87909d1a85a2df86a8c5880ee2b0a8553eac2b0a300bec0e2f20920
#12 0.752 === CONT  TestMultiArchManifest
#12 0.752     env.go:70: added blob sha256:02934fef04dc77addbe304fb80c389a4eea5c53743c9654a63e1a48c59efba85
#12 0.752     env.go:82: added tag docker.io/library/test:latest -> sha256:02934fef04dc77addbe304fb80c389a4eea5c53743c9654a63e1a48c59efba85
#12 0.752 --- PASS: TestSingleArchManifest (0.05s)
#12 0.752 --- PASS: TestTitle (0.05s)
#12 0.752 --- PASS: TestMultiArchManifest (0.08s)
#12 0.752 PASS
#12 0.752 coverage: 44.4% of statements
#12 0.752 ok    github.com/docker/go-imageinspect       0.082s  coverage: 44.4% of statements
#12 0.752 ?     github.com/docker/go-imageinspect/cmd/imageinspect      [no test files]
#12 0.752 ?     github.com/docker/go-imageinspect/testutil      [no test files]
#12 DONE 0.8s

#13 [test-coverage 1/1] COPY --from=test /tmp/coverage.txt /coverage.txt
#13 DONE 0.1s

#14 exporting to client
#14 copying files 9.09kB 0.0s done
#14 DONE 0.0s