Devcontainer: move git setup to postStartCommand

* postCreateCommand is executed too early
* If git config commands run in postCreate, a global .gitconfig will be created
* Copy of local .gitconfig will be skipped if .gitconfig already exists in container
* Move to later stage
* https://github.com/devcontainers/cli/issues/98
* https://github.com/microsoft/vscode-remote-release/issues/4855#issuecomment-831920085

Signed-off-by: GitHub <noreply@github.com>

.devcontainer/devcontainer.json

@@ -3,6 +3,7 @@
 	"dockerComposeFile": "docker-compose.yml",
 	"service": "nextclouddev",
 	"postCreateCommand": ".devcontainer/setup.sh",
+	"postStartCommand": ".devcontainer/postStart.sh",
 	"forwardPorts": [
 		80,
 		8080,

.devcontainer/postStart.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+# Set git safe.directory
+git config --global --add safe.directory /var/www/html
+git config --global --add safe.directory /var/www/html/3rdparty

.devcontainer/setup.sh

@@ -3,10 +3,6 @@ DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )/../" >/dev/null 2>&1 && pwd )"
 
 cd $DIR/
 
-# Set git safe.directory
-git config --global --add safe.directory /var/www/html
-git config --global --add safe.directory /var/www/html/3rdparty
-
 git submodule update --init
 
 # Codespace config