added docker-compose for linux

serial_bridge/entrypoint.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+set -e
+
+echo "[socat] Creating virtual serial port pair..."
+socat PTY,raw,echo=0,link=/tmp/vcom_read PTY,raw,echo=0,link=/tmp/vcom_write &
+
+# Wait until both PTY symlinks exist
+for i in $(seq 1 20); do
+    if [ -e /tmp/vcom_read ] && [ -e /tmp/vcom_write ]; then
+        echo "[socat] Virtual ports ready: /tmp/vcom_read <-> /tmp/vcom_write"
+        break
+    fi
+    sleep 0.5
+done
+
+echo "[test_writer] Starting test COM port writer..."
+cd /app/test_comport_writer
+COM_PORT=/tmp/vcom_write python test_writer.py &
+
+echo "[serial_bridge] Starting Flask SSE server..."
+cd /app/serial_bridge
+exec python app.py