Remove keys volume mount and add install script

- Remove /etc/provisioning/keys mount (ephemeral keys are in-memory now)
- Remove /etc/provisioning VOLUME from Dockerfile
- Add deploy/install.sh that creates config files before docker compose up,
  preventing Docker from creating directories in place of missing bind mounts
- Update README with install script usage

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

deploy/install.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+DEPLOY_DIR="${1:-/opt/provisioning}"
+
+mkdir -p "$DEPLOY_DIR"
+cd "$DEPLOY_DIR"
+
+REPO_RAW="https://gitea.thewrightserver.net/josh/Provisioning/raw/branch/main"
+
+# Always pull latest compose file
+curl -sfO "$REPO_RAW/docker-compose.yml"
+
+# Create config files from examples if they don't exist
+if [ ! -f provisioning.yaml ]; then
+    curl -sf "$REPO_RAW/deploy/provisioning.example.yaml" -o provisioning.yaml
+    echo "Created provisioning.yaml — edit it with your values before starting."
+fi
+
+if [ ! -f server-types.yaml ]; then
+    curl -sf "$REPO_RAW/deploy/server-types.example.yaml" -o server-types.yaml
+    echo "Created server-types.yaml — edit it with your hardware types."
+fi
+
+echo ""
+echo "Deploy directory: $DEPLOY_DIR"
+echo ""
+echo "Next steps:"
+echo "  1. Edit provisioning.yaml with your network/cluster settings"
+echo "  2. Edit server-types.yaml with your hardware types"
+echo "  3. docker compose up -d"