Use cisagov fork of gophish

[dav3r]

🗣 Description

This PR switches from using gophish/gophish to cisagov/gophish as the basis for the Docker image generated by this repository.

💭 Motivation and context

The cisagov/gophish contains some mission-critical customizations (e.g. gophish/gophish#1486) that have not yet been merged in to gophish/gophish, so until that happens, we will use our own fork. Issue #25 has been created to revert back to the parent repo at a later date.

🧪 Testing

I successfully built cisagov/gophish:0.11.0-cisa.1 with the updated Dockerfile from this PR. Once it was built, I verified that it worked as expected by pulling it down to a Staging Gophish instance and using it there without any problems.

✅ Checklist

• This PR has an informative and human-readable title.
• Changes are limited to a single goal - eschew scope creep!
• All future TODOs are captured in issues, which are referenced
  in code comments.
• All relevant type-of-change labels have been added.
• I have read the CONTRIBUTING document.
• These code changes follow cisagov code standards.
• All new and existing tests pass.

[felddy]

Looks good. Took a semver jab for posterity.
👊 💪

[felddy]

Why you no use + metadata?
e.g., 0.11.0+cisa.1

[dav3r]

Thanks @felddy for the reminder about this. I did use + instead of - originally, but when GitHub Actions created the release assets (e.g. https://github.com/cisagov/gophish/releases/tag/v0.11.0-cisa.1), the download URLs for the platform-specific zip files were different from what was expected.

Instead of generating URLs like this: https://github.com/cisagov/gophish/releases/download/v0.11.0%2Bcisa.1/gophish-v0.11.0%2Bcisa.1-linux-64bit.zip

GitHub Actions was generating URLs like this: https://github.com/cisagov/gophish/releases/download/v0.11.0%2Bcisa.1/gophish-v0.11.0.cisa.1-linux-64bit.zip

The first + was being correctly URL encoded to %2B, but the second one was being converted to a . and that was going to be a hassle for us here:

gophish-docker/Dockerfile

Lines 33 to 35 in f21b923

	RUN wget -nv https://github.com/gophish/gophish/releases/download/${GOPHISH_VERSION}/gophish-v${GOPHISH_VERSION}-linux-64bit.zip && \
	unzip gophish-v${GOPHISH_VERSION}-linux-64bit.zip && \
	rm -f gophish-v${GOPHISH_VERSION}-linux-64bit.zip

[hillaryj]

🌮