feat: add healthz endpoint (#494)

backend/internal/controller/healthz_controller.go

@@ -0,0 +1,29 @@
+package controller
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+// NewHealthzController creates a new controller for the healthcheck endpoints
+// @Summary Healthcheck controller
+// @Description Initializes healthcheck endpoints
+// @Tags Health
+func NewHealthzController(r *gin.Engine) {
+	hc := &HealthzController{}
+
+	r.GET("/healthz", hc.healthzHandler)
+}
+
+type HealthzController struct{}
+
+// healthzHandler godoc
+// @Summary Responds to healthchecks
+// @Description Responds with a successful status code to healthcheck requests
+// @Tags Health
+// @Success 204 ""
+// @Router /healthz [get]
+func (hc *HealthzController) healthzHandler(c *gin.Context) {
+	c.Status(http.StatusNoContent)
+}