start on repond to message (basic input and builder for dm)

back/validator/schemas/response-schema.json

@@ -0,0 +1,21 @@
+{
+    "type": "object",
+    "properties": {
+        "user": {
+            "type": "string"
+        },
+        "roomId": {
+            "type": "number"
+        },
+        "text": {
+            "type": "string"
+        },
+        "html": {
+            "type": "string"
+        }
+    },
+    "required": [
+        "user", "roomId", "text", "html"
+    ],
+    "additionalProperties": false
+}