Add Gitea backup/restore scripts, parameterize configs

- Add gitea/backup.sh and gitea/restore.sh
- Move hardcoded values in gitea/docker-compose.yml to gitea/.env
- Move immich .env from root to immich-app/, update env_file path
- Remove root docker-compose.yml (was only an include alias)

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

gitea/backup.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+source "$SCRIPT_DIR/.env"
+
+if [ ! -d "$BACKUP_DIR" ]; then
+  echo "Error: BACKUP_DIR does not exist: $BACKUP_DIR" >&2
+  exit 1
+fi
+if ! docker info > /dev/null 2>&1; then
+  echo "Error: Docker is not accessible" >&2
+  exit 1
+fi
+
+cleanup() {
+  echo "Restarting all services..."
+  docker compose -f "$SCRIPT_DIR/docker-compose.yml" up -d
+}
+trap cleanup EXIT
+
+echo "Stopping all services..."
+docker compose -f "$SCRIPT_DIR/docker-compose.yml" down
+
+echo "Starting database only..."
+docker compose -f "$SCRIPT_DIR/docker-compose.yml" up -d db
+sleep 5
+
+echo "Running gitea dump..."
+docker run --rm \
+  --network gitea_gitea \
+  -e USER_UID=1001 \
+  -e USER_GID=1001 \
+  -v "${GITEA_DATA}:/data" \
+  -v "${BACKUP_DIR}:/backup" \
+  docker.gitea.com/gitea:1.25.3 \
+  /bin/sh -c "chown 1001:1001 /tmp && su-exec 1001:1001 /bin/sh -c 'cd /tmp && gitea dump -c /data/gitea/conf/app.ini --tempdir /tmp' > /backup/backup.log 2>&1 && cp /tmp/gitea-dump-*.zip /backup/"
+
+echo "Backup completed successfully"