Polish README

[ralf0131]

Polish quick start.

[CLAassistant]

All committers have signed the CLA.

[messixukejia]

编译的过程是，make里面会拉起docer，剩下的事情都在docker里完成了，golang的依赖在docker中已经解决了。所以这里不需要修改

[ralf0131]

如果没有安装 golang 运行时，make 的时候会直接报错，需要先 yum install go 才能继续完成编译流程

Emulate Docker CLI using podman. Create /etc/containers/nodocker to quiet msg.
rm -rf "license_coverage.txt"
rm -rf "output" "dist"
rm -rf behavior-test
rm -rf performance-test
rm -rf core-test
rm -rf e2e-engine-coverage.txt
rm -rf find_licenses
rm -rf "generated_files"
rm -rf .testCoverage.txt
rm -rf .coretestCoverage.txt
rm -rf core/build
rm -rf plugin_main/*.dll
rm -rf plugin_main/*.so
rm -rf plugins/all/all.go
rm -rf plugins/all/all_debug.go
rm -rf plugins/all/all_windows.go
rm -rf plugins/all/all_linux.go
go mod tidy -modfile "go.mod" || true
/bin/sh: go: command not found
./scripts/import_plugins.sh plugins.yml,external_plugins.yml go.mod
===============GENERATING PLUGINS IMPORT==================
config: plugins.yml,external_plugins.yml
modfile: go.mod
root-dir: /root/loongcollector
==========================================================
./scripts/import_plugins.sh: line 39: go: command not found
make: *** [Makefile:149: import_plugins] Error 127