fix: redirect stdin of docker compose exec to /dev/null to prevent stealing script pipe

install.sh

@@ -252,7 +252,7 @@ info "Waiting for PostgreSQL (up to 60s)..."
 DB_READY=false
 I=1
 while [ "$I" -le 30 ]; do
-  if $SUDO docker compose exec -T postgres pg_isready -U "${POSTGRES_USER}" -d "${POSTGRES_DB}" >/dev/null 2>&1; then
+  if $SUDO docker compose exec -T postgres pg_isready -U "${POSTGRES_USER}" -d "${POSTGRES_DB}" </dev/null >/dev/null 2>&1; then
     DB_READY=true
     info "PostgreSQL is ready"
     break
@@ -269,7 +269,7 @@ echo "=== CHECKPOINT: after postgres loop ==="
 
 info "Waiting for Redis..."
 for ((i=1; i<=15; i++)); do
-  if $SUDO docker compose exec -T redis redis-cli ping 2>/dev/null | grep -q PONG; then
+  if $SUDO docker compose exec -T redis redis-cli ping </dev/null 2>/dev/null | grep -q PONG; then
     info "Redis is ready"
     break
   fi