fixup! add sonarscanner doc

Author: michal-duda-sonarsource

sonar-scanner-cli/README-short.txt

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+SonarScanner is the official scanner used to run code analysis on SonarQube.

sonar-scanner-cli/content.md

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+# What is SonarScanner CLI?
+
+[SonarScanner](https://redirect.sonarsource.com/doc/install-configure-scanner.html) is the official scanner used to run code analysis on SonarQube.
+
+# How to use this image
+
+To scan your repository, you have to:
+
+-	pass your source code to the scanner. Your source code repository should be mounted to the containers `/usr/src` directory, since this is its default work directory.
+-	(optional) unless you already defined both `sonar.host.url` and `sonar.projectKey` in `sonar-project.properties` file in the root of your source code repository, you also need to:
+	-	pass the URL of your SonarQube instance / SonarCloud (with `-Dsonar.host.url` parameter or `SONAR_HOST_URL` environment variable) and make sure it can be accessed from the container. The default URL that is used is `http://localhost:9000` but depending on your setup, it's probably not what you need.
+	-	pass the SonarQube / SonarCloud project key (with `-Dsonar.projectKey` parameter)
+
+```console
+docker run \
+    --rm \
+    -v ${MY_REPOSITORY_PATH}:/usr/src \
+    sonar-scanner-cli \
+    -Dsonar.host.url="${MY_SONARQUBE_URL}" \
+    -Dsonar.projectKey=${MY_PROJECT_KEY}
+```
+
+For more details on how to use the image (like caching, using self-signed certificates, etc.), visit [SonarScanner](https://redirect.sonarsource.com/doc/install-configure-scanner.html) page in the SonarQube documentation.

sonar-scanner-cli/get-help.md

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+[the SonarSource Community forum](https://community.sonarsource.com/tags/c/help/sq/docker), [the Docker Community Forums](https://forums.docker.com/), [the Docker Community Slack](https://blog.docker.com/2016/11/introducing-docker-community-directory-docker-community-slack/), or [Stack Overflow](https://stackoverflow.com/search?tab=newest&q=docker)

sonar-scanner-cli/github-repo

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+https://github.com/SonarSource/sonar-scanner-cli-docker

sonar-scanner-cli/license.md

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+View [license information](http://www.gnu.org/licenses/lgpl.txt) for the software contained in this image.

sonar-scanner-cli/logo.png

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+[SonarSource](%%GITHUB-REPO%%)