add jq to docker images

[itoffshore]

• adds jq to installed packages for parsing json endpoints on step-ca
• tested as working in an Alpine LXD

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Name of feature:

• improve dependencies

Pain or issue this feature alleviates:

• adds the ability to parse json endpoints in step-ca (I'm building a web fingerprint with step-cli / caddy containers so clients can always bootstrap)

Is there documentation on how to use this feature? If so, where?

• I'll probably add some more docs after I have it working well

In what environments or workflows is this feature supported?

• containers

Supporting links/other PRs/issues:

so the current fingerprint can always be queried from a container

💔Thank you!

[itoffshore]

• command tested with jq in an Alpine LXD

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[hslatman]

Thank you, @itoffshore!