docs(testing): align guides with the current Playwright workflow

[haoyu-haoyu]

Context

The testing docs had drifted from the way the repo is actually wired today. The main testing page still pointed contributors toward Cypress, while the repository-level end-to-end workflow now runs through Playwright. The root README also had a couple of small inconsistencies that make first-time navigation harder than it needs to be.

Changes & Results

I updated the main testing guide so it points contributors to the current Playwright workflow, links to the dedicated Playwright page, and frames the older package-local Cypress commands as legacy rather than the default path.

I also refreshed the Playwright guide so the commands, report viewer, screenshot notes, and manual server instructions match the current config in the repo.

Finally, I cleaned up the root README by removing a duplicated newsletter block, fixing the community link, and replacing the outdated repository tree with a current overview of the main packages and test directories.

Testing

I ran git diff --check.

I also tried to run a prettier check on the edited files, but the local npm cache in ~/.npm has a permissions problem on this machine, so that validation did not complete.

Checklist

PR

• My Pull Request title is descriptive, accurate and follows the semantic-release format and guidelines.

Code

• My changes are documented where they need to be.

Public Documentation Updates

• The documentation has been updated to reflect the public-facing changes in this pull request.

Tested Environment

• OS: macOS 26.4
• Node version: 22.21.1
• Browser: Not applicable (documentation-only change)

Greptile Summary

This PR aligns OHIF's testing documentation with the current Playwright-based workflow, refreshes the root README, and bumps the Node base image to 20.19.0-slim across all Dockerfiles. The documentation changes are broadly accurate and well-structured, but one typo was introduced in testing.md that would cause the test-data install command to fail.

Key changes:

• testing.md: Replaces the Cypress-centric e2e instructions with a concise Playwright quick-start; frames legacy Cypress commands correctly as package-local/legacy.
• playwright-testing.md: Switches all commands from bun to yarn/npx, narrows the screenshot path description to match the current chromium-only default in playwright.config.ts, and adds an accurate manual server snippet using OHIF_PORT=3335.
• README.md: Removes a duplicated newsletter block, fixes the bare community.ohif.org href to https://community.ohif.org, and replaces a stale (and partly duplicated) directory tree with a clean overview that matches the actual repo layout.
• All Dockerfiles: Minor Node image bump from 20.18.1-slim → 20.19.0-slim.
• Issue found: testing.md line 82 changed the DICOM conversion tool install command from dicomp10-to-dicomweb (the real npm package) to dicom10-to-dicomweb (which does not exist on the npm registry). This would cause the command to fail for any contributor trying to add new test data.

Confidence Score: 4/5

Safe to merge after fixing the dicom10-to-dicomweb → dicomp10-to-dicomweb typo in testing.md.

All changes are documentation and Docker image bump — no runtime code is touched. The only issue is a single incorrect npm package name in the test-data section of testing.md that would break the npm install command for contributors adding new test data. Everything else cross-checks cleanly against playwright.config.ts and package.json.

platform/docs/docs/development/testing.md — contains the incorrect dicom10-to-dicomweb package name at line 82.

Important Files Changed

Filename	Overview
platform/docs/docs/development/testing.md	Redirects e2e section to Playwright workflow correctly, but introduces a typo — dicom10-to-dicomweb should be dicomp10-to-dicomweb (the actual npm package).
platform/docs/docs/development/playwright-testing.md	Updated commands from bun to yarn/npx, aligned screenshot path with actual playwright.config.ts (chromium-only), and refreshed manual server instructions — all accurate against the config.
README.md	Removes duplicate newsletter block, fixes bare community.ohif.org URL to include https://, and replaces stale/duplicate directory tree with a clean, accurate overview matching the current repo layout.
Dockerfile	Bumps Node base image from 20.18.1-slim to 20.19.0-slim; no logic change.
platform/app/.recipes/Nginx-Dcm4chee-Keycloak/dockerfile	Bumps Node base image from 20.18.1-slim to 20.19.0-slim to match root Dockerfile.
platform/app/.recipes/Nginx-Dcm4chee/dockerfile	Bumps Node base image from 20.18.1-slim to 20.19.0-slim.
platform/app/.recipes/Nginx-Orthanc-Keycloak/dockerfile	Bumps Node base image from 20.18.1-slim to 20.19.0-slim.
platform/app/.recipes/Nginx-Orthanc/dockerfile	Bumps Node base image from 20.18.1-slim to 20.19.0-slim.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A([Contributor]) --> B[yarn test:data\ngit submodule update]
    B --> C{Run mode?}
    C -->|CI pipeline| D[yarn test:e2e:ci\nnpx playwright test]
    C -->|Interactive / UI| E[yarn test:e2e:ui\nnpx playwright test --ui]
    C -->|Headed| F[yarn test:e2e:headed]
    C -->|Debug| G[yarn test:e2e:debug]
    C -->|Manual server| H["npx cross-env APP_CONFIG=config/e2e.js\nOHIF_PORT=3335 yarn start\n→ localhost:3335"]
    H --> I[Playwright reuses\nexisting server]
    D & E & F & G & I --> J{Tests pass?}
    J -->|No - screenshots missing| K[Playwright auto-generates\ntests/screenshots/chromium/…]
    K --> L[Verify ground-truth\nthen re-run]
    L --> J
    J -->|Yes| M[npx playwright show-report\ntests/playwright-report]

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Greptile also left 1 inline comment on this PR.

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[greptile-apps]

Incorrect npm package name

The PR changed dicomp10-to-dicomweb (the real package on npm/GitHub at chafey/dicomp10-to-dicomweb-js) to dicom10-to-dicomweb, which does not exist on the npm registry. Running this command will fail with a "package not found" error. The original spelling in the file being replaced was correct.

Suggested change

	npm install -g dicom10-to-dicomweb
	npm install -g dicomp10-to-dicomweb