fix example bundle dockerfile so that it copies the manifests folder

[erdii]

Description of the change:
fix example bundle dockerfile

pre-fix this would copy all yaml files in ./manifests into the file
/manifests and it would only keep the last file's contents.

Adding that trailing slash properly creates the /manifests directory and copies
all files as expected.

Motivation for the change:

I tried to generate an index image from such a broken bundle image and even first suspected #603.

Reviewer Checklist

• Implementation matches the proposed design, or proposal is updated to match implementation
• Sufficient unit test coverage
• Sufficient end-to-end test coverage
• Docs updated or added to /docs
• Commit messages sensible and descriptive

[openshift-ci]

Hi @erdii. Thanks for your PR.

I'm waiting for a operator-framework member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[codecov]

Codecov Report

Merging #668 (edb64dd) into master (92e5523) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #668      +/-   ##
==========================================
- Coverage   48.71%   48.70%   -0.02%     
==========================================
  Files          88       88              
  Lines        7673     7673              
==========================================
- Hits         3738     3737       -1     
- Misses       3200     3201       +1     
  Partials      735      735              

Impacted Files	Coverage Δ
pkg/registry/query.go	61.07% <0.00%> (-0.68%)	⬇️

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[timflannagan]

/lgtm

[timflannagan]

/ok-to-test

[kevinrizza]

/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: erdii, kevinrizza

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