- introduce better more stable fallbacks in case the configuration is missing

- move configurations into subfolder for easier discovery
- simplify missing value fallback specification

src/utils.ts

@@ -1,8 +1,12 @@
 import * as fs from 'fs'
 import {Configuration} from './configuration'
 
-export function readConfiguration(filename: string): Configuration {
-  const rawdata = fs.readFileSync(filename, 'utf8')
-  const configurationJSON: Configuration = JSON.parse(rawdata)
-  return configurationJSON
+export function readConfiguration(filename: string): Configuration | null {
+  try {
+    const rawdata = fs.readFileSync(filename, 'utf8')
+    const configurationJSON: Configuration = JSON.parse(rawdata)
+    return configurationJSON
+  } catch (error) {
+    return null
+  }
 }