follow-up/Dockerization.md

@@ -104,6 +104,14 @@ WORKDIR /root/app
 ```
 Again, this sets the current working directory inside the container.
 
+```Dockerfile
+RUN apt-get update && apt-get install -y mosquitto-clients libgpiod2 python3 python3-pip && rm -rf /var/lib/apt/lists/*
+```
+Here all necessary dependencies we may use later.
+- `mosquitto-clients`: used for communication with out mqtt server
+- `libgpiod2`: GPIO library
+- `python3` & `python3-pip`: our sensors use Python scripts, so we need Python too. Pip because we want to install some packages.
+
 ```Dockerfile
 COPY --from=build /root/.m2 /root/.m2
 COPY --from=build /root/app/target/classes classes
@@ -112,9 +120,16 @@ COPY --from=build /root/app/classpath.txt .
 Here all files we need from the build stage are copied to our container.
 
 ```Dockerfile
+COPY ./docker-scripts/requirements.txt requirements.txt
+RUN python3 -m pip install -r requirements.txt && rm requirements.txt
+```
+Here the Python packages from the `requirements.txt` are installed.
+
+```Dockerfile
+COPY ./docker-scripts/sensors ./sensor-scripts
 COPY start_component_docker.sh start_component.sh
 ```
-This copies the `start_component_docker.sh` file into the container, renaming it in the process.
+This copies our sensor scripts and the `start_component_docker.sh` file into the container, renaming the later it in the process.
 
 ```Dockerfile
 ENTRYPOINT export CLASSPATH=/root/app/classes:$(cat /root/app/classpath.txt) && /root/app/start_component.sh