OpenGraph metadata is broken

[oleg-nenashev]

Proposal

The injected opengraph metadata is not correct, and hence the images are not injected. Once #17 is merged, I suggest using https://library.wiremock.org/images/logo/template-library-opengraph.png

Reproduction steps

1. Open the root page
2. Open the webpage headers in Developer Tools of your browser

References

No response