HAOS Add-on: Dockerfile Fix - COPY src/ direkt, pip3 inline

- COPY src/ /app/ statt zweistufig (vermeidet src/requirements.txt not found)
- pip3 inline statt requirements.txt (kein separater COPY-Schritt nötig)
- ARG BUILD_FROM mit amd64 Default (build.yaml Deprecation umgangen)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

haos-addon/Dockerfile

@@ -1,14 +1,16 @@
-ARG BUILD_FROM
+ARG BUILD_FROM=ghcr.io/home-assistant/amd64-base-python:3.11-alpine3.18
 FROM ${BUILD_FROM}
 
 WORKDIR /app
 
-COPY src/requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+COPY src/ /app/
 
-COPY src/ .
+RUN pip3 install --no-cache-dir \
+    pymodbus==3.6.9 \
+    paho-mqtt==1.6.1 \
+    flask==3.0.3
 
 COPY run.sh /run.sh
-RUN chmod +x /run.sh
+RUN chmod a+x /run.sh
 
 CMD ["/run.sh"]