docs: update README.md and add LICENSE

LICENSE

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+MIT License
+
+Copyright (c) 2024 Paessler GmbH
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# Containerized Multi-Platform Probe for PRTG
+
+This is the [docker container][dockerhub] of the [Multi-Platform Probe] for Paessler PRTG.
+Use this container to install and configure the multi-platform probe to monitor remote systems.
+
+For more information about remote probes and PRTG, see the [PRTG Manual: Remote Probes and Multiple Probes][prtgmanual:probes].
+
+  [dockerhub]: https://hub.docker.com/r/paessler/multi-platform-probe
+  [Multi-Platform Probe]: https://kb.paessler.com/en/topic/90140
+  [prtgmanual:probes]: https://www.paessler.com/manuals/prtg/remote_probes_and_multiple_probes
+
+## Compatibility and requirements
+
+Requires as of **[PRTG 24.2.96][prtg-96]**.
+We recommend that you always update to the latest version of PRTG via the Auto-Update feature.
+
+Requires a [NATS server](#install-and-configure-a-nats-server) connection configured in PRTG.
+
+ [prtg-96]: https://www.paessler.com/prtg/history/stable#24.2.96.1315
+ [manual]: https://paessler.canto.global/direct/document/qvou34dmut1uh0gg6mqee3ip2k/K-e9xGiEiT58XzlH3s_Nf-B3lVk/original?content-type=application%2Fpdf&name=Multi-Platform+Probe+Manual.pdf
+
+## How to use the multi-platform probe container
+
+The set up to use this container is a three-part process:
+
+1. [Install and configure a NATS server](#install-and-configure-a-nats-server)
+2. [Configure PRTG](#configure-prtg)
+3. [Install and use the container](#container-usage)
+
+ℹ️ If you already have a NATS server configured in PRTG, skip to [step 3](#container-usage).
+
+### Install and configure a NATS server
+
+Paessler GmbH provides the **NATS Server for Paessler PRTG** Windows installer that does the following:
+
+* Installs the NATS server executable.
+* Configures the NATS server.
+* Installs and starts the NATS server service in the background.
+
+For the installer and step-by-step instructions on how to set up a NATS server on Windows, see section **Step 1: Install a NATS server** in the [Multi-Platform Probe for PRTG (PDF)][manual] manual.
+
+ℹ️ If you want to deploy your NATS server on a non-Windows system, see the NATS documentation on their website.
+
+### Configure PRTG
+
+Once you set up your NATS server, you must configure PRTG to accept connections to the NATS server.
+This is done from the PRTG web interface via **Setup** | **Cores & Probes** | **[Multi-Platform Probe Connection Settings][prtg-manual:cores]**.
+
+For step-by-step instructions on how to configure PRTG, see section **Step 2: Configure connection in PRTG** in the [Multi-Platform Probe for PRTG (PDF)][manual] manual.
+
+ [prtg-manual:cores]: https://www.paessler.com/manuals/prtg/core_and_probes#multi_platform_probe_connection
+
+### Container usage
+
+You can now use containers to set up multi-platform probe instances.
+
+To run the multi-platform probe for PRTG, you have to create a configuration file with at least the following items:
+
+```yaml
+access_key: YOUR_PROBE_ACCESS_KEY
+nats:
+  url: tls://localhost:23561
+  authentication:
+    user: USER
+    password: PASSWORD
+```
+
+You must put it into the `/config/config.yml` volume of the docker container.
+
+Another volume `/opt/paessler/share/scripts` is available for the scripts of the [Script v2][prtgmanual:scriptv2] sensor.
+
+[prtgmanual:scriptv2]: https://www.paessler.com/br/manuals/prtg/script_v2_sensor
+
+```sh
+docker run -it \
+  --network bridge \
+  -v ./scripts:/opt/paessler/share/scripts:ro \
+  -v ./config:/config \
+  --cap-add NET_ADMIN \
+  --cap-add NET_RAW
+  paessler/multi-platform-probe:latest
+```
+
+You can also use `docker-compose`. There is an example file here: [docker-compose.yml](docker-compose.yml)
+
+## Feedback and issues
+
+We are thankful for any feedback or ideas on how to improve. If you want to submit feedback or report an issue, please open an issue in our [Issue Tracker].
+
+ [Issue Tracker]: https://github.com/PaesslerAG/docker-multi-platform-probe/issues
+
+## Licensing
+
+See [LICENSE](./LICENSE) for the full MIT License text.