Move environments to separate page, add staging and prod URLs

requested review from @Gabriel_Hemmerich

assigned to @Marco_Holz

added 1 commit

• ef926912 - Add environments to sidebar.js

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added 1 commit

• 3919af75 - Fix links (get-started.mdx -> environments.mdx)

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added 1 commit

• 8ab7e2ac - Fix link

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merged

mentioned in commit c4009681