feat: implement channel runtime connectors

external-connector/Dockerfile

@@ -0,0 +1,23 @@
+FROM python:3.12-slim
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends nodejs npm ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+COPY pyproject.toml ./
+COPY package.json ./
+RUN pip install --no-cache-dir \
+        "fastapi>=0.115.0,<1.0" \
+        "httpx>=0.27.0,<1.0" \
+        "pydantic>=2.7.0,<3.0" \
+        "qrcode>=8.0,<9.0" \
+        "uvicorn[standard]>=0.30.0,<1.0" \
+    && npm install --omit=dev --package-lock=false
+
+COPY external_connector ./external_connector
+
+ENV CONNECTOR_HOME=/var/lib/external-connector
+EXPOSE 8787
+
+CMD ["python", "-m", "external_connector.main"]