link front page cloud button to portal landing page

Review here

assigned to @jandt-desy

According to @konrad remark, the big button on front page should -now that the helmholtz.cloud landing page has been revised- link to that page, not to /services anymore.

@konrad @SpickerHZB @frust45 @andreas.klotz fine with that?

changed the description

added 1 commit

• 366f9c3f - change wording to 'Helmholtz Cloud'

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added 4 commits

• 366f9c3f...3360980a - 2 commits from branch master
• 5c00925c - link front page cloud button to portal landing page
• cd0d0cd1 - change wording to 'Helmholtz Cloud'

Compare with previous version

resolved all threads

mentioned in commit 1a4b302d

merged