add README.md

Signed-off-by: Peter Siegmund <mars3142@noreply.mars3142.dev>

README.md

@@ -0,0 +1,75 @@
+# BambuLab MQTT Bridge
+
+This project provides a bridge between a BambuLab 3D printer and an MQTT broker. It allows you to forward status and event messages from your printer to any MQTT-compatible system, enabling easy integration with home automation, monitoring, or logging solutions.
+
+## Features
+
+- Connects securely to a BambuLab printer via MQTT over TLS
+- Forwards all printer messages to a target MQTT broker
+- Supports custom topic prefixing to avoid collisions
+- Runs as a minimal, secure Docker container (multi-arch: amd64 & arm64)
+- Configuration via environment variables or `.env` file
+
+## Usage
+
+### 1. Configuration
+
+Create a `.env` file in the project directory or provide the following environment variables:
+
+```
+PRINTER_IP=192.168.1.100
+PRINTER_ACCESS_CODE=your_printer_code
+PRINTER_SERIAL=your_printer_serial
+TARGET_BROKER_IP=mqtt.example.com
+TARGET_PORT=8883
+TARGET_USERNAME=mqttuser
+TARGET_PASSWORD=mqttpassword
+TARGET_PREFIX=bambulab/
+```
+
+### 2. Build Docker Image
+
+```
+docker build -t bambu-mqtt .
+```
+
+### 3. Run Container
+
+```
+docker run --rm \
+  --env-file .env \
+  bambu-mqtt
+```
+
+Or set environment variables directly with `-e`.
+
+### 4. Portainer/Compose Example
+
+```yaml
+services:
+  bambu-mqtt:
+    image: git.mars3142.dev/mars3142/bambu_mqtt:latest
+    env_file:
+      - .env
+    restart: unless-stopped
+```
+
+## Development
+
+- Python dependencies are managed via `requirements.txt`.
+- The code is fully commented in English.
+- The Dockerfile follows best practices: non-root, multi-arch, healthcheck, minimal size.
+
+## Versioning & CI
+
+- The Docker image is automatically built and pushed for `amd64` and `arm64` via Gitea Actions.
+- Image tags are derived from the version label in the Dockerfile.
+
+## License
+
+MIT License
+
+## Author
+
+Peter Siegmund (mars3142@noreply.mars3142.dev)
+ChatGPT