Add server make targets, install script, and .env setup

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/server-install.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+set -e
+
+: "${WEBROOT:?WEBROOT is not set}"
+: "${USER_REPO:?USER_REPO is not set}"
+
+echo "==> Installing PHP extensions"
+apt-get install -y php-curl php-gd php-mbstring php-xml php-zip php-yaml php-intl
+
+echo "==> Downloading Grav"
+cd "$WEBROOT"
+wget -q https://getgrav.org/download/core/grav-admin/latest -O grav-admin.zip
+unzip -q grav-admin.zip
+mv grav-admin/* grav-admin/.htaccess .
+rm -rf grav-admin grav-admin.zip
+
+echo "==> Cloning user repo"
+rm -rf user
+git clone "$USER_REPO" user
+
+echo "==> Setting permissions"
+find "$WEBROOT" -type f -exec chmod 664 {} \;
+find "$WEBROOT" -type d -exec chmod 775 {} \;
+
+echo "==> Done. Visit your domain to complete setup."