added docker-compose for linux

serial_bridge/Dockerfile

@@ -0,0 +1,24 @@
+FROM python:3.11-slim
+
+RUN apt-get update && apt-get install -y --no-install-recommends socat && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+# Install serial_bridge dependencies (server-only, no pystray/PyInstaller)
+COPY serial_bridge/requirements.server.txt serial_bridge/requirements.server.txt
+RUN pip install --no-cache-dir -r serial_bridge/requirements.server.txt
+
+# Install test_writer dependencies
+COPY test_comport_writer/requirements.txt test_comport_writer/requirements.txt
+RUN pip install --no-cache-dir -r test_comport_writer/requirements.txt
+
+# Copy application code
+COPY serial_bridge/ serial_bridge/
+COPY test_comport_writer/ test_comport_writer/
+
+COPY serial_bridge/entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+EXPOSE 5000
+
+ENTRYPOINT ["/entrypoint.sh"]