Add robust mumble bridge connect and channel-id handling

mumble-bridge/Dockerfile

@@ -0,0 +1,33 @@
+FROM python:3.11-slim
+
+WORKDIR /app
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends libopus0 \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY app.py .
+
+ENV LOG_LEVEL=INFO \
+    DEVICE_ID=esp32-evs-1 \
+    UDP_LISTEN_HOST=0.0.0.0 \
+    UDP_LISTEN_PORT=5004 \
+    INPUT_SAMPLE_RATE=16000 \
+    INPUT_CHANNELS=1 \
+    MUMBLE_SAMPLE_RATE=48000 \
+    MUMBLE_FRAME_MS=20 \
+    MUMBLE_AUDIO_GAIN=1.0 \
+    MUMBLE_HOST= \
+    MUMBLE_PORT=64738 \
+    MUMBLE_USERNAME= \
+    MUMBLE_PASSWORD= \
+    MUMBLE_CHANNEL= \
+    MUMBLE_CHANNEL_ID=0 \
+    MUMBLE_CONNECT_TIMEOUT_SEC=30 \
+    MUMBLE_RECONNECT_SEC=5 \
+    MUMBLE_VERBOSE=false
+
+CMD ["python", "app.py"]