Don't build site when docs are unchanged

[hakman]

https://docs.netlify.com/configure-builds/file-based-configuration/#ignore-builds

[hakman]

I did some quick tests and seems to work as expected.

10:38:54 AM: Build ready to start
10:38:56 AM: build-image version: 30f629161c0736b1a3ecd8b418e5eeffab5c0faf
10:38:56 AM: build-image tag: v3.3.14
10:38:56 AM: buildbot version: 578c7628507b646d2c2478c57933187c689f36ec
10:38:57 AM: Fetching cached dependencies
10:38:58 AM: Starting to download cache of 479.5MB
10:38:59 AM: Finished downloading cache in 1.648867276s
10:38:59 AM: Starting to extract cache
10:39:14 AM: Finished extracting cache in 14.785719038s
10:39:14 AM: Finished fetching cache in 16.578033794s
10:39:14 AM: Starting to prepare the repo for build
10:39:15 AM: Preparing Git Reference pull/9235/head
10:39:23 AM: Detected ignore command in Netlify configuration file. Proceeding with the specified command: 'git diff --quiet HEAD^ HEAD docs/'
10:39:23 AM: User-specified ignore command returned exit code 0. Returning early from build.
10:39:23 AM: Failed during stage 'checking build content for changes': Canceled build due to no content change
10:39:24 AM: Finished processing build request in 27.338024528s

[rifelpet]

there might be changes outside of docs/ that we'd want to trigger a netlify build:

• netlify.toml
• Makefile
• mkdocs.yml
• images/mkdocs/

Any chance we can include those in the ignore condition?

[rifelpet]

hijacking your PR to test your verify-hashes job :)

/test pull-kops-verify-hashes

[moshevayner]

/lgtm

[rifelpet]

this PR does now build the docs site since it changes netlify.toml, so I think this is good to merge now 👍 thanks!

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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[moshevayner]

/retest

[hakman]

/retest