Support services (#42)

Replace #5

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Jason Song <i@wolfogre.com>
Reviewed-on: https://gitea.com/gitea/act/pulls/42
Reviewed-by: Jason Song <i@wolfogre.com>
Co-authored-by: Zettat123 <zettat123@gmail.com>
Co-committed-by: Zettat123 <zettat123@gmail.com>

pkg/container/docker_run.go

@@ -16,6 +16,8 @@ import (
 	"strconv"
 	"strings"
 
+	networktypes "github.com/docker/docker/api/types/network"
+
 	"github.com/go-git/go-billy/v5/helper/polyfill"
 	"github.com/go-git/go-billy/v5/osfs"
 	"github.com/go-git/go-git/v5/plumbing/format/gitignore"
@@ -46,6 +48,25 @@ func NewContainer(input *NewContainerInput) ExecutionsEnvironment {
 	return cr
 }
 
+func (cr *containerReference) ConnectToNetwork(name string) common.Executor {
+	return common.
+		NewDebugExecutor("%sdocker network connect %s %s", logPrefix, name, cr.input.Name).
+		Then(
+			common.NewPipelineExecutor(
+				cr.connect(),
+				cr.connectToNetwork(name, cr.input.NetworkAliases),
+			).IfNot(common.Dryrun),
+		)
+}
+
+func (cr *containerReference) connectToNetwork(name string, aliases []string) common.Executor {
+	return func(ctx context.Context) error {
+		return cr.cli.NetworkConnect(ctx, name, cr.input.Name, &networktypes.EndpointSettings{
+			Aliases: aliases,
+		})
+	}
+}
+
 // supportsContainerImagePlatform returns true if the underlying Docker server
 // API version is 1.41 and beyond
 func supportsContainerImagePlatform(ctx context.Context, cli client.APIClient) bool {