improve install.sh (#4)

Author: vac (Brendan)

install.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -e
 
@@ -9,12 +9,19 @@ Before you submit any github issue, please do the following check:
 * make sure the docker daemon is running
 * make sure you use docker compose v2: recommend 2.x.x, got $(docker compose version --short 2>/dev/null || echo not install)
 * check your internet connection if timeout happens
+* check for potential port conflicts if you have local services listening on all interfaces (e.g. another redis container listening on *:6379)
 ===========================
 EOF
 }
 
 trap notes ERR
 
+if ! docker info >/dev/null 2>&1; then
+     echo "Docker daemon or Docker Desktop is not running... please check" 2>&1
+     false
+     exit 1
+fi
+
 DOWNLOAD_URL='https://github.com/apitable/apitable.github.io/releases/latest/download/docker-compose.tar.gz'
 
 mkdir -p apitable