Refresh the devcontainer

With the latest optimizations from upstream.

.devcontainer/initialize.sh

@@ -1,18 +1,7 @@
 #!/bin/bash
 
-set -euo pipefail
-
-readonly wanted_line_key="LOCAL_WORKSPACE_FOLDER"
-readonly wanted_line="${wanted_line_key}='${PWD}'"
-readonly file=".env"
-
-echo "Writing ${wanted_line} to ${file}" >&2
-if [[ -f "${file}" ]] && grep --quiet "^${wanted_line_key}=" "${file}"; then
-    sed --in-place "s,^${wanted_line_key}=.*,${wanted_line}," "${file}"
-else
-    echo "${wanted_line}" >>"${file}"
-fi
-
-set -x
+set -euxo pipefail
 
 git submodule update --init
+
+.devcontainer/frigate-hass-integration/.devcontainer/set_dot_env.sh