feat: add entrypoint to nginx

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

.docker/scripts/nginx-entrypoint.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+# Generate self-signed certificate if it doesn't exist
+if [ ! -f /tmp/nextcloud.pem ]; then
+    echo "Generating self-signed certificate..."
+    openssl req -new -x509 -days 365 -nodes \
+        -subj "/C=BR/ST=State/L=City/O=Nextcloud/CN=localhost" \
+        -out /tmp/nextcloud.pem -keyout /tmp/nextcloud.pem 2>/dev/null || true
+fi
+
+# Execute nginx
+exec nginx -g "daemon off;"