add troubleshooting for importing images

Author: cedev935

README.md

@@ -966,6 +966,20 @@ function foo(bar: string) {
 //  inside your app, if you need { baz: number }
 type FooReturn = ReturnType<typeof foo>; // { baz: number }
 ```
+# Troubleshooting Handbook: Images and other non-TS/TSX files
+
+Use [declaration merging](https://www.typescriptlang.org/docs/handbook/declaration-merging.html):
+
+```ts
+// declaration.d.ts 
+// anywhere in your project, NOT the same name as any of your .ts/tsx files
+declare module '*.png'
+
+// importing in a tsx file
+import * as logo from "./logo.png";
+```
+
+Related issue: https://github.com/Microsoft/TypeScript-React-Starter/issues/12 and [StackOverflow](https://stackoverflow.com/a/49715468/4216035)
 
 # Troubleshooting Handbook: TSLint