docs: update README

acceptance/repository-cloudant/README.md

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+# @loopback/test-repository-cloudant
+
+Acceptance tests for `@loopback/repository` + `loopback-connector-cloudant`.
+
+## Running the test suite
+
+### Using own Cloudant instance
+
+If you have a local Cloudant instance listening on `localhost` and the default
+port, with a `root` user and an empty password, use the following command:
+
+```bash
+npm test
+```
+
+If you have a local or remote Cloudant instance and would like to use that to
+run the test suite, use the following command:
+
+**Linux & MacOS**
+
+```bash
+CLOUDANT_URL=<URL> CLOUDANT_HOST=<HOST> CLOUDANT_PORT=<PORT> CLOUDANT_USER=<USER> CLOUDANT_PASSWORD=<PASSWORD> CLOUDANT_DATABASE=<DATABASE> npm test
+```
+
+**Windows**
+
+```bash
+CLOUDANT_URL=<URL>
+SET CLOUDANT_HOST=<HOST>
+SET CLOUDANT_PORT=<PORT>
+SET CLOUDANT_USER=<USER>
+SET CLOUDANT_PASSWORD=<PASSWORD>
+SET CLOUDANT_DATABASE=<DATABASE>
+npm test
+```
+
+### Using Docker (Linux, MacOS, WSL)
+
+If you do not have a local Cloudant instance, you can also run the test suite
+with very minimal requirements.
+
+- Assuming you have [Docker](https://docs.docker.com/engine/installation/)
+  installed, run the following script which would spawn a Cloudant instance on
+  your local:
+
+  ```bash
+  source setup.sh <URL> <HOST> <PORT> <USER> <PASSWORD> <DATABASE>
+  ```
+
+  Where `<URL>`, `<HOST>`, `<PORT>`, `<USER>`, `<PASSWORD>` and `<DATABASE>` are
+  optional parameters. The default values are `url`, `localhost`, `3306`,
+  `root`, `pass` and `testdb` respectively.
+
+- Run the test:
+
+  ```bash
+  npm test
+  ```
+
+## Contributors
+
+See
+[all contributors](https://github.com/strongloop/loopback-next/graphs/contributors).
+
+## License
+
+MIT