Add docker folder

docker/Dockerfile

@@ -0,0 +1,9 @@
+FROM python:3.11-slim
+
+WORKDIR /app
+
+COPY . .
+
+EXPOSE 5353
+
+CMD ["python", "broadcast.py"]

docker/docker-compose.yml

@@ -0,0 +1,8 @@
+services:
+  udp-multicast:
+    build:
+      context: ../src
+      dockerfile: ../docker/Dockerfile
+    ports:
+      - 5353:5353
+    network_mode: "host"