Adding authorisation options for API access

- ldap currently the only supported method
adding authorisation options for local repositories
  - ldap groups per repo

api/publish.go

@@ -267,7 +267,13 @@ func apiPublishRepoOrSnapshot(c *gin.Context) {
 				return
 			}
 
+			err = CheckGroup(c, localRepo.LdapGroup)
+			if err != nil {
+				c.AbortWithError(403, err)
+			}
+
 			resources = append(resources, string(localRepo.Key()))
+
 			sources = append(sources, localRepo)
 		}
 	} else {