Update mechanism for detecting capabilities such as Ingress

Changelog for 0.7.1-rc1:

• PR #54 feat: check server capabilities usin the preferred resources endpoint by @LucasRoesler
• PR #53 Fix CI badge in readme by @pyaillet

Commits
38a72f6 Set write permissions on the publish workflow by @LucasRoesler
7448775 Remove push of PR images by @LucasRoesler
ce23842 ci: set token permissions for the build job by @LucasRoesler
f9cb215 Use repository owner for username by @LucasRoesler
210fe47 fix: prefer networking v1, if avaiable by @LucasRoesler
feb0715 ci: use publish retag by @LucasRoesler
fa84581 fix: upgrade to go 1.16 by @LucasRoesler
cb72870 feat: check server capabilities usin the preferred resources endpoint by @LucasRoesler
ab88e03 Fix CI badge in readme by @pyaillet

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