Improve the configuration schema

crates/config/src/schema.rs

@@ -0,0 +1,38 @@
+// Copyright 2022 The Matrix.org Foundation C.I.C.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use schemars::{
+    gen::SchemaGenerator,
+    schema::{InstanceType, NumberValidation, Schema, SchemaObject},
+};
+
+pub fn port(_gen: &mut SchemaGenerator) -> Schema {
+    Schema::Object(SchemaObject {
+        instance_type: Some(InstanceType::Integer.into()),
+        number: Some(Box::new(NumberValidation {
+            minimum: Some(1.0),
+            maximum: Some(65535.0),
+            ..NumberValidation::default()
+        })),
+        ..SchemaObject::default()
+    })
+}
+
+pub fn hostname(_gen: &mut SchemaGenerator) -> Schema {
+    Schema::Object(SchemaObject {
+        instance_type: Some(InstanceType::String.into()),
+        format: Some("hostname".to_string()),
+        ..SchemaObject::default()
+    })
+}