Add cache clearing and auto-migrate to Docker entrypoint

Clears config and application cache on every container start to
prevent stale provider references after image updates. Creates the
storage symlink and runs pending migrations if the app is already
installed.

Fixes #614

docker/production/entrypoint.d/00-setup.sh

@@ -45,3 +45,15 @@ if ! grep -q '^APP_KEY=[^[:space:]]' /var/www/html/.env; then
     echo "**** Generating new APP_KEY variable ****"
     ./artisan key:generate -n
 fi
+
+echo "**** Clearing cached config ****"
+./artisan config:clear 2>/dev/null || true
+./artisan cache:clear 2>/dev/null || true
+
+echo "**** Creating storage link ****"
+./artisan storage:link --force 2>/dev/null || true
+
+echo "**** Running migrations (if app is installed) ****"
+if ./artisan migrate:status > /dev/null 2>&1; then
+    ./artisan migrate --force
+fi