Added instructions for docker usage; added Update section

Dockerfile

@@ -2,6 +2,7 @@ FROM python:3.13-slim
 RUN useradd --create-home --shell /bin/bash solarcontrol
 WORKDIR /script
 COPY solarcontrol.py ./
-RUN pip install --upgrade pip && pip3 install --no-cache-dir paho-mqtt python-dotenv requests
+RUN pip install --upgrade pip
 USER solarcontrol
-ENTRYPOINT ["/usr/bin/python3", "solarcontrol.py"]
+RUN pip install --user --no-cache-dir paho-mqtt python-dotenv requests
+CMD ["python", "solarcontrol.py"]

README.md

@@ -8,7 +8,13 @@ Enforce a zero export (or whatever consumption you like) policy with an OpenDTU-
 
 ### Docker
 
-Todo
+To run it using docker, try the `docker-compose.yaml` file present in this repository. You will need the .env file too for that reasons, so the easiest thing is to just run the following commands:
+
+```bash
+git clone https://git.privacynerd.de/BlueFox/SolarControl.git && cd SolarControl
+vi .env  # adjust the script to your needs
+docker-compose up -d && docker-compose logs -f
+```
 
 
 ### Bare-bone
@@ -22,6 +28,11 @@ python3 lge320reader.py
 Please note: the .env file needs to be in the same folder or any other folder higher up in the directory structure as the script (more specifically, the WORKDIR). It is just a help, actually, the script searches for specific variables in its environment variables. It only loads the .env file so that you do not need to `export` all the files before running (see https://pypi.org/project/python-dotenv/ for more details). This also means that when using it in docker, you can set the docker containers environment file to that .env file and it will be accepted too.
 
 
+## Updating
+
+To update, simply use `git pull` to pull the latest changes. Afterwards, you need to restart your script (with docker, just use `docker-compose up -d --force-recreate`).
+
+
 ## Building docker
 
 To build the image for docker, simply use the following commands:
@@ -30,7 +41,7 @@ To build the image for docker, simply use the following commands:
 docker login  # login to docker hub
 docker buildx create --name buildx-multi-arch
 docker buildx use buildx-multi-arch
-docker buildx build --no-cache --platform linux/amd64,linux/386,linux/arm/v5,linux/arm/v7,linux/arm64/v8,linux/ppc64le,linux/s390x -t bluefox42/solarcontrol:<TAGNAME> . --push
+docker buildx build --no-cache --platform linux/amd64,linux/386,linux/arm/v5,linux/arm/v7,linux/arm64/v8,linux/ppc64le,linux/s390x -t bluefox42/solarcontrol:<VERSION> -t bluefox42/solarcontrol:latest . --push
 ```
 
 

docker-compose.yaml

@@ -0,0 +1,8 @@
+services:
+  solarcontrol:
+    image: bluefox42/solarcontrol:latest
+    hostname: solarcontrol
+    container_name: solarcontrol
+    env_file: ".env"
+    restart: unless-stopped
+    stop_grace_period: 15s