Create POST /{format} endpoint (file.lua)

app/src/main/res/raw/file.lua

@@ -0,0 +1,18 @@
+return {
+    uri = "/{format}",
+    method = Method.POST,
+    accepts = Mime.JSON,
+    consumer = function(request)
+        local body = json.decode(request.body)
+        local format = (request.params.format or "WAV"):upper()
+        local audioFormat = AudioFormat[format]
+        local mime = Mime[format]
+
+        local file = tts.sayToFile(body.text, body.language or "en", audioFormat)
+
+        return {
+            mime = mime,
+            data = file
+        }
+    end
+}