add api/v1/instance info handler + instance model (#18)

internal/api/client/instance/instanceget.go

@@ -0,0 +1,20 @@
+package instance
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+func (m *Module) InstanceInformationGETHandler(c *gin.Context) {
+	l := m.log.WithField("func", "InstanceInformationGETHandler")
+
+	instance, err := m.processor.InstanceGet(m.config.Host)
+	if err != nil {
+		l.Debugf("error getting instance from processor: %s", err)
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "internal server error"})
+		return
+	}
+
+	c.JSON(http.StatusOK, instance)
+}