Add image and streaming from USB camera

Plus a little freshen up of the readme's

.devcontainer/devcontainer.json

@@ -2,6 +2,7 @@
     "name": "ROS 2 Development Container",
     "privileged": true,
     "remoteUser": "matt",
+    "initializeCommand": "stat -c %g /var/run/docker.sock > .devcontainer/.docker_gid",
     "build": {
         "dockerfile": "Dockerfile",
         "args": {
@@ -38,7 +39,8 @@
     "mounts": [
        "source=/tmp/.X11-unix,target=/tmp/.X11-unix,type=bind,consistency=cached",
        "source=/dev/dri,target=/dev/dri,type=bind,consistency=cached",
-       "source=${localEnv:HOME}/.gitconfig,target=/home/matt/.gitconfig,type=bind,consistency=cached,readonly"
+       "source=${localEnv:HOME}/.gitconfig,target=/home/matt/.gitconfig,type=bind,consistency=cached,readonly",
+       "source=/var/run/docker.sock,target=/var/run/docker.sock,type=bind"
     ],
     "postCreateCommand": "sudo rosdep update && sudo rosdep install --from-paths lidar/src robot/src --ignore-src -y && sudo chown -R $(whoami) /home/ws/ && npm --prefix /home/ws/webui/frontend install"
 }