func Start(cfg []Config) (dockers []*DockerInfo, err error) {
	err = initClient()
	if err != nil {
		return dockers, err
	}
	dockers = make([]*DockerInfo, 0)
	prerequisites(cfg)
	for _, data := range cfg {
		docker := &DockerInfo{}
		var containerConfig *container.Config
		var hostConfig *container.HostConfig
		if data.Name == "" {
			return dockers, fmt.Errorf("Docker/container name is missing , mandatory")
		}
		docker.name = data.Name
		hostConfig, err = getHostConfig(data)
		if err != nil {
			logger.Log.Error("failed to get host config ,err :", zap.String("reasong", err.Error()))
			return dockers, err
		}
		containerConfig, err = getContainerConfig(data)
		if err != nil {
			logger.Log.Error("Failed to get container config, err: ", zap.String("resson", err.Error()))
			return dockers, err
		}
		docker.cli = cli
		docker.ctx = context.Background()
		docker.body, err = docker.cli.ContainerCreate(docker.ctx, containerConfig, hostConfig, nil, data.Name)
		if err != nil {
			logger.Log.Error("Failed to bind ports and create docker, err: ", zap.String("resson", err.Error()))
			return dockers, err
		}
		err = docker.cli.ContainerStart(docker.ctx, docker.body.ID, types.ContainerStartOptions{})
		if err != nil {
			logger.Log.Error("Failed to start docker container , err : ", zap.String("resson", err.Error()))
			docker.cli.ContainerRemove(docker.ctx, docker.body.ID, types.ContainerRemoveOptions{})
			return dockers, err
		}
		if len(containerConfig.Cmd) > 0 {
			time.Sleep(data.Wait * time.Second)
			for _, cmd := range containerConfig.Cmd {
				var execute types.IDResponse
				execConf := types.ExecConfig{
					Tty: containerConfig.Tty,
					Cmd: []string{cmd},
				}
				execute, err = docker.cli.ContainerExecCreate(docker.ctx, docker.body.ID, execConf)
				if err != nil {
					logger.Log.Error("Failed to create docker cmd executer in container for cmd : ", zap.String("reason", err.Error()))
					return dockers, err
				}
				if err = docker.cli.ContainerExecStart(docker.ctx, execute.ID, types.ExecStartCheck{}); err != nil {
					logger.Log.Error("Failed to execute cmd in docker : ", zap.String("reason", err.Error()))
					panic(err)
				}
			}
		}
		dockers = append(dockers, docker)
	}
	return dockers, nil
}
Start function starts the docker basis on configuration
package docker
import (
	"context"
	"fmt"
	"optisam-backend/common/optisam/logger"
	"strings"
	"time"
	"github.com/docker/docker/api/types"
	"github.com/docker/docker/api/types/container"
	"github.com/docker/docker/client"
	"github.com/docker/go-connections/nat"
	"go.uber.org/zap"
)
var cli *client.Client
func initClient() error {
	var err error
	if cli == nil {
		cli, err = client.NewEnvClient()
		if err != nil {
			logger.Log.Error("Failed to get client, err ", zap.String("reaons", err.Error()))
			return err
		}
	}
	return nil
}
func getPortBindingMap(binds []string, host string) (nat.PortMap, error) {
	var val nat.PortMap
	if len(binds) == 0 || host == "" {
		err := fmt.Errorf("bindings/host is missing in config")
		return val, err
	}
	val = make(nat.PortMap)
	var containerPort nat.Port
	for _, v := range binds {
		bindings := []nat.PortBinding{}
		ports := strings.Split(v, ":")
		if len(ports) == 2 {
			containerPort = nat.Port(strings.TrimSpace(ports[0]))
			systemPorts := strings.Split(ports[1], ",")
			for _, port := range systemPorts {
				bindings = append(bindings, nat.PortBinding{HostIP: host, HostPort: strings.TrimSpace(port)})
			}
		} else {
			continue
		}
		val[containerPort] = bindings
	}
	return val, nil
}
func getHostConfig(cfg Config) (*container.HostConfig, error) {
	bindings, err := getPortBindingMap(cfg.Bindings, cfg.Host)
	if err != nil {
		return nil, err
	}
	return &container.HostConfig{PortBindings: bindings}, nil
}
func getContainerConfig(cfg Config) (*container.Config, error) {
	type temp struct{}
	if len(cfg.Bindings) == 0 {
		return nil, fmt.Errorf("bindings are missing in config")
	}
	if cfg.Image == "" {
		return nil, fmt.Errorf("Image is missing in config")
	}
	mappings := make(nat.PortSet)
	for _, v := range cfg.Bindings {
		exposedPort := strings.Split(v, ":")[0]
		mappings[nat.Port(exposedPort)] = temp{}
	}
	return &container.Config{
		Image:        cfg.Image,
		ExposedPorts: mappings,
		Env:          cfg.Env,
		Cmd:          cfg.Cmd,
		Tty:          cfg.Tty,
	}, nil
}