Review app in iframe
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=27193) </details> <!--IssueSummary end--> ### Problem to solve Review apps take you from the context of GitLab. This is welcome sometimes, but not always. If you had the ability to render it inline in GitLab, you'd be able to press merge immediately after confirming all looks / works well. ### Target audience - Parker, Product Manager, https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas#parker-product-manager - Delaney, Development Team Lead, https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas#delaney-development-team-lead - Sasha, Software Developer, https://about.gitlab.com/handbook/marketing/product-marketing/roles-personas#sasha-software-developer ### Further details <!-- Include use cases, benefits, and/or goals (contributes to our vision?) --> ### Proposal <!-- How are we going to solve the problem? Try to include the user journey! https://about.gitlab.com/handbook/journeys/#user-journey --> ### Permissions and Security <!-- What permissions are required to perform the described actions? Are they consistent with the existing permissions as documented for users, groups, and projects as appropriate? Is the proposed behavior consistent between the UI, API, and other access methods (e.g. email replies)? --> ### Documentation <!-- See the Feature Change Documentation Workflow https://docs.gitlab.com/ee/development/documentation/feature-change-workflow.html Add all known Documentation Requirements here, per https://docs.gitlab.com/ee/development/documentation/feature-change-workflow.html#documentation-requirements --> ### What does success look like, and how can we measure that? <!-- Define both the success metrics and acceptance criteria. Note that success metrics indicate the desired business outcomes, while acceptance criteria indicate when the solution is working correctly. If there is no way to measure success, link to an issue that will implement a way to measure this. --> ### Links / references
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