First version for the developer to develop Cherry

doc/CherryDeveloper/README.md

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+# Cherry Developer
+The purpose of the document is to expalin how to develop and publish Cherry
+
+
+# Running locally
+To run locally the runtime, in Intellij for example, check the different topics
+
+## Configuration
+In local, you can use a H2 or a Postgres database.
+By default, [application.yaml](../../src/main/resources/application.yaml) use an H2 database. 
+To use a Postgres database, use the  [application-postgres.yaml](../../src/main/resources/application-postgres.yaml)
+
+In Intellij, use `--spring.profiles.active=postgres`
+
+## Start the runtime
+Execute `io.camunda.CherryApplication`
+
+![IntellijConfiguration.png](IntellijConfiguration.png)
+
+## Debug the UI
+To debug the UI, the React part can be start via npm
+
+```shell
+cd src/main/frontend
+npm start
+```
+
+
+# Build the docker image
+
+Use the command (replace the version by the correct one)
+```shell
+docker build -t ghcr.io/camunda-community-hub/zeebe-cherry-runtime:3.1.2 .
+```
+
+A new image is build. Push the image, and tag it with the `lastest`
+
+```shell
+docker tag ghcr.io/camunda-community-hub/zeebe-cherry-runtime:3.1.2 ghcr.io/camunda-community-hub/zeebe-cherry-runtime:latest
+docker push ghcr.io/camunda-community-hub/zeebe-cherry-runtime:3.1.2
+docker push ghcr.io/camunda-community-hub/zeebe-cherry-runtime:latest
+```
+
+Go to https://github.com/camunda-community-hub/zeebe-cherry-runtime/pkgs/container/zeebe-cherry-runtime and check that the last image is correctly updated
+![GitHub Package page.png](GitHubPackage.png)
+
+
+