docs: add notes about runtime bootstrapping of option 2

docs/CONTAINER_OPTION2.md

@@ -102,3 +102,65 @@ mosquitto_sub -h 127.0.0.1 -p 1883 -t '#'
 # or if you used another port
 mosquitto_sub -h 127.0.0.1 -p 1884 -t '#'
 ```
+
+## Alternative setups
+
+### Starting tedge-container-bundle and bootstrap at runtime
+
+For instances where you can't do the bootstrapping of the container before the container starts, you can use the following instructions which will configure and bootstrap the container after it has been started, though it will involve restarting the container after it is configured.
+
+1. Create the required docker network and volumes
+
+    ```sh
+    docker network create tedge
+    docker volume create device-certs
+    docker volume create tedge
+    ```
+
+    If you have previously created the volumes, then it is recommended to delete them (to ensure a fresh installation) using the folowing commands:
+
+    ```sh
+    docker volume rm device-certs
+    docker volume rm tedge
+    ```
+
+2. Start the container. Note: the container won't really work until you have manually bootstrapped it, so you will see a lot of error when looking at the logs)
+
+    ```sh
+    docker run -d \
+        --name tedge \
+        --restart always \
+        --add-host host.docker.internal:host-gateway \
+        --network tedge \
+        -p "127.0.0.1:1883:1883" \
+        -p "127.0.0.1:8000:8000" \
+        -p "127.0.0.1:8001:8001" \
+        -v "device-certs:/etc/tedge/device-certs" \
+        -v "tedge:/data/tedge" \
+        -v /var/run/docker.sock:/var/run/docker.sock:rw \
+        -e TEDGE_C8Y_OPERATIONS_AUTO_LOG_UPLOAD=always \
+        ghcr.io/thin-edge/tedge-container-bundle:latest
+    ```
+
+3. Start interactive shell in the container (using the default user), and run the following commands
+
+    ```sh
+    docker exec -u tedge -it tedge sh
+    ```
+
+    Run the following commands to bootstrap your container:
+
+    ```sh
+    tedge cert create --device-id "mydevice0001"
+    tedge config set c8y.url thin-edge-io.eu-latest.cumulocity.com
+    tedge cert upload c8y
+
+    # reboot the container, or alternatively you can use docker cli for this
+    reboot
+    ```
+
+4. The device should now have been registered with Cumulocity and you can also check the container logs (from outside of the container):
+
+    ```sh
+    docker logs -f tedge
+    ```