add banner to old.gigadb.org to point to gigadb.org

[only1chunts]

User story

As a website user
I want to know that I'm looking at the old (old.gigadb.org) or beta (beta.gigadb.org) version of GigaDB site pages So that I can be offered to view the current gigadb.org version of the page I'm on

Acceptance criteria

Given a user somehow accidentally arrives on an old.gigadb.org website page When they view the page in any browser Then a prominent banner is displayed at the top of the page saying "You are viewing an old version of the GigaDB website some functionality may not be available, please switch to the current version here. "

Given a user has navigated to beta.gigadb.org When they view the page in any browser Then they see a banner mentioning "This is an experimental, under development version of the website, if you want to see the current version, go here"

Given there is a link to the current website displayed in a banner on an old.gigadb.org's page When the user click on the link Then the user is switched to the exact same page on the current website

Given there is a link to current website displayed in a banner on a beta.gigadb.org's page When the user click on the link Then the user is switched to the exact same page on the current website

Additional Info

Follow up to #1276

Product Backlog Item Ready Checklist

• [ ] Business value is clearly articulated
• [ ] Item is understood enough by the IT team so it can make an informed decision as to whether it can complete this item
• [ ] Dependencies are identified and no external dependencies would block this item from being completed
• [ ] At the time of the scheduled sprint, the IT team has the appropriate composition to complete this item
• [ ] This item is estimated and small enough to comfortably be completed in one sprint
• [ ] Acceptance criteria are clear and testable
• [ ] Performance criteria, if any, are defined and testable
• [ ] The Scrum team understands how to demonstrate this item at the sprint review

Product Backlog Item Done Checklist

• [ ] Item(s) in increment pass all Acceptance Criteria
• [ ] Code is refactored to best practices and coding standards
• [ ] Documentation is updated as needed
• [ ] Data security has not been compromised (with particular reference to the personal information we hold in GigaDB)
• [ ] No deviation from the team technology stack and software architecture has been introduced
• [ ] The product is in a releasable state (i.e. the increment has not broken anything)

[only1chunts]

I cant access old.gigadb.org, so do we still need this ticket? or should it be changed to adding a banner to "staging.gigadb.org"?