refacto: reorganize folder tree to split lora gateway stack from app

Those stack won't necessarily be on the same host, so they need to be
split

app/consumer/Dockerfile

@@ -0,0 +1,6 @@
+FROM python:3.13-slim
+WORKDIR /app
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+COPY main.py .
+CMD ["python", "main.py"]