refactor(api): restructured API for type safety, maintainability and docs generation

- These changes makes the API incombatible with previous versions
- Added new types for error handling, success responses, and health checks.
- Updated health check logic to utilize the new types for better clarity and structure.
- Refactored existing handlers to improve response consistency and error handling.
- Updated Makefile to include a new target for generating API types from Swagger.
- Updated "new agent" API to respond an encrypted cert pair

internal/api/v1/docker/containers.go

@@ -0,0 +1,64 @@
+package dockerapi
+
+import (
+	"context"
+	"sort"
+
+	"github.com/docker/docker/api/types/container"
+	"github.com/gin-gonic/gin"
+	"github.com/yusing/go-proxy/internal/gperr"
+)
+
+type Container struct {
+	Server string `json:"server"`
+	Name   string `json:"name"`
+	ID     string `json:"id"`
+	Image  string `json:"image"`
+	State  string `json:"state"`
+} // @name ContainerResponse
+
+// @BasePath		/api/v1
+// @Summary		Get containers
+// @Description	Get containers
+// @Tags			docker
+// @Accept			json
+// @Produce		json
+// @Success		200	{array}		Container
+// @Failure		403	{object}	apitypes.ErrorResponse
+// @Failure		500	{object}	apitypes.ErrorResponse
+// @Router			/docker/containers [get]
+func Containers(c *gin.Context) {
+	serveHTTP[Container](c, GetContainers)
+}
+
+func GetContainers(ctx context.Context, dockerClients DockerClients) ([]Container, gperr.Error) {
+	errs := gperr.NewBuilder("failed to get containers")
+	containers := make([]Container, 0)
+	for server, dockerClient := range dockerClients {
+		conts, err := dockerClient.ContainerList(ctx, container.ListOptions{All: true})
+		if err != nil {
+			errs.Add(err)
+			continue
+		}
+		for _, cont := range conts {
+			containers = append(containers, Container{
+				Server: server,
+				Name:   cont.Names[0],
+				ID:     cont.ID,
+				Image:  cont.Image,
+				State:  cont.State,
+			})
+		}
+	}
+	sort.Slice(containers, func(i, j int) bool {
+		return containers[i].Name < containers[j].Name
+	})
+	if err := errs.Error(); err != nil {
+		gperr.LogError("failed to get containers", err)
+		if len(containers) == 0 {
+			return nil, err
+		}
+		return containers, nil
+	}
+	return containers, nil
+}