Add initial infrastructure and backup scripts for Gitea and homelab deployment

- Create README.md with project layout and quick start instructions
- Implement backup scripts for Gitea, including database and repository exports
- Add systemd service and timer for automated Gitea backups
- Develop bootstrap scripts for homelab and VPS setup
- Document architecture and restore procedures
- Configure Caddy reverse proxy and Docker Compose for service management
- Establish secrets management guidelines

backups/scripts/pg-dump.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+TS="$(date +%F_%H%M%S)"
+OUT="/srv/backups/gitea/pg"
+mkdir -p "$OUT"
+
+PGUSER="${PGUSER:-gitea}"
+PGDATABASE="${PGDATABASE:-gitea}"
+PGPASSFILE="${PGPASSFILE:-/srv/secrets/postgres_password}"
+
+if [[ ! -f "$PGPASSFILE" ]]; then
+  echo "Missing $PGPASSFILE"
+  exit 1
+fi
+
+export PGPASSWORD="$(cat "$PGPASSFILE")"
+docker exec -e PGPASSWORD="$PGPASSWORD" gitea-db sh -lc "pg_dump -U '$PGUSER' -d '$PGDATABASE'" > "$OUT/gitea-pg-$TS.sql"
+
+echo "Wrote: $OUT/gitea-pg-$TS.sql"