Merge pull request 'Add sample code' (#1) from add-sample-project into main

Reviewed-on: #1

.gitignore

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+vars.yaml
+*.versatiles

Dockerfile

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+# Use the latest docker image of VersaTiles including the frontend.
+FROM versatiles/versatiles-frontend:v0.15.6-alpine    

README.md

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-# cf-versatiles
+# Cloud Foundry: Sample Versatiles App
 
-Sample code to deploy Versatiles app as a Docker container on Cloud Foundry
+This repository contains the sample code to deploy a [versatiles](https://docs.versatiles.org/) app to STACKIT Cloud Foundry as a docker container.
+It is based on the bundled [front-end](https://docs.versatiles.org/guides/local_server_docker.html#optionb--bundled-frontend-image-versatiles-frontend) image, please refer to versatiles documentation for further information.
+
+> NOTE: The project contains a dockerfile, which is merely a wrapper around the public versatiles image. It can be uploaded to a private project in STACKIT Container Registry
+> to demonstrate the usage of private images in Cloud Foundry. You can also use any other registry, public or private.
+
+## Preparation
+
+Please install and [configure](https://docs.stackit.cloud/stackit/en/how-to-setup-an-object-storage-client-objectstorage-71009862.html) s3cmd in advance.
+
+### Object Storage
+
+Create a bucket: `s3cmd mb s3://<BUCKET_NAME>`.
+
+Make bucket [public](https://docs.stackit.cloud/stackit/en/bucket-policies-75139510.html#BucketPolicies-SampleBucketpolicies>) applying following policy:
+
+```json
+{
+   "Statement":[
+      {
+         "Sid": "MakePublicReadable",
+         "Effect":"Allow",
+         "Principal":"*",
+         "Action":"s3:GetObject",
+         "Resource":"urn:sgws:s3:::<BUCKET_NAME>/*"
+      }
+   ]
+}
+```
+
+`s3cmd setpolicy <PATH-TO-POLICY-JSON> s3://<BUCKET_NAME>`
+
+Download the `tiles` file: `wget -c "https://download.versatiles.org/osm.versatiles"`.
+
+> NOTE: the whole world map is about 65GB.
+
+Upload tile file to the bucket:
+
+```sh
+s3cmd put <FILE_NAME> s3://<BUCKET_NAME>
+```
+
+## Deploy the app with Cloud Foundry
+
+Prepare a `vars.yaml` file containing the [variables](https://docs.cloudfoundry.org/devguide/deploy-apps/manifest-attributes.html) used in the manifest.
+
+Push the app: `CF_DOCKER_PASSWORD=<YOUR_PASSWORD> cf push --vars-file <PATH-TO-VARS-FILE>`.
+
+## Custom Domains
+
+Please refer to official STACKIT [documentation](https://docs.stackit.cloud/stackit/en/how-to-register-custom-domains-for-apps-on-stackit-cloud-foundry-67771947.html).

manifest.yaml

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+---
+applications:
+- name: versatiles-test
+  memory: 1024M
+  disk: 1Gi
+  #routes: 
+  # - route: 
+  #   options:
+  #    loadbalancing: round-robin
+  instances: 1
+  random-route: true
+  docker:
+    image: ((imageUrl))
+    username: ((dockerUsername))
+  timeout: 10
+  health-check-type: http
+  health-check-http-endpoint: /
+  command: versatiles serve -p $PORT -s frontend-dev.br.tar ((versatilesUrl))