Use WORKSPACE_DIRECTORY for add-on directory (#2000)

* Use WORKSPACE_DIRECTORY  for add-on directory

* Don't break Alpine backed WSL

* Add comment

.devcontainer/supervisor.sh

@@ -1,18 +1,19 @@
 #!/bin/bash
 set -eE
 
+SUPERVISOR_VERSON="$(curl -s https://version.home-assistant.io/dev.json | jq -e -r '.supervisor')"
 DOCKER_TIMEOUT=30
 DOCKER_PID=0
 
-SUPERVISOR_VERSON="$(curl -s https://version.home-assistant.io/dev.json | jq -e -r '.supervisor')"
-
-
 function start_docker() {
     local starttime
     local endtime
 
-    update-alternatives --set iptables /usr/sbin/iptables-legacy || echo "Fails adjust iptables"
-    update-alternatives --set ip6tables /usr/sbin/iptables-legacy || echo "Fails adjust ip6tables"
+    if grep -q 'Alpine' /proc/version; then
+        # The docker daemon does not start when running Alpine backed WSL2 without adjusting iptables
+        update-alternatives --set iptables /usr/sbin/iptables-legacy || echo "Fails adjust iptables"
+        update-alternatives --set ip6tables /usr/sbin/iptables-legacy || echo "Fails adjust ip6tables"
+    fi
 
     echo "Starting docker."
     dockerd 2> /dev/null &
@@ -33,7 +34,6 @@ function start_docker() {
     echo "Docker was initialized"
 }
 
-
 function stop_docker() {
     local starttime
     local endtime
@@ -79,13 +79,14 @@ function run_supervisor() {
     mkdir -p /tmp/supervisor_data
     docker run --rm --privileged \
         --name hassio_supervisor \
+        --privileged \
         --security-opt seccomp=unconfined \
         --security-opt apparmor:unconfined \
         -v /run/docker.sock:/run/docker.sock:rw \
         -v /run/dbus:/run/dbus:ro \
         -v /run/udev:/run/udev:ro \
         -v /tmp/supervisor_data:/data:rw \
-        -v "/workspaces/addons":/data/addons/local:rw \
+        -v "$WORKSPACE_DIRECTORY":/data/addons/local:rw \
         -v /etc/machine-id:/etc/machine-id:ro \
         -e SUPERVISOR_SHARE="/tmp/supervisor_data" \
         -e SUPERVISOR_NAME=hassio_supervisor \
@@ -141,4 +142,4 @@ cleanup_docker
 init_dbus
 init_udev
 run_supervisor
-stop_docker
+stop_docker