More TypeScript (#103)

This does some minimal TS conversions. The goal is to turn off
`allowJs`.

src/@types/geocodio-library-node.d.ts

@@ -0,0 +1,2 @@
+// Trivial module declaration to satisfy tsc
+declare module 'geocodio-library-node';

src/@types/sqlite.d.ts

@@ -0,0 +1,2 @@
+// Trivial module declaration to satisfy tsc
+declare module 'fastify-sqlite';

src/app.ts

@@ -37,6 +37,7 @@ export default async function (
   // through your application
   fastify.register(AutoLoad, {
     dir: path.join(__dirname, 'plugins'),
+    forceESM: true,
     options: Object.assign({}, opts),
   });
 

src/plugins/swagger.js → src/plugins/swagger.ts

@@ -16,7 +16,7 @@ export default fp(async function (fastify) {
     },
     refResolver: {
       buildLocalReference(json, baseUri, fragment, i) {
-        return json.$id || `my-fragment-${i}`;
+        return (json.$id as string) || `my-fragment-${i}`;
       },
     },
   });

src/routes/openapi.js → src/routes/openapi.ts

@@ -1,4 +1,6 @@
-export default async function (fastify) {
+import { FastifyInstance } from 'fastify';
+
+export default async function (fastify: FastifyInstance) {
   fastify.get('/spec.json', { schema: { hide: true } }, (_, reply) => {
     const spec = fastify.swagger();
     reply.status(200).type('application/json').send(spec);

tsconfig.json

@@ -1,6 +1,5 @@
 {
   "extends": "fastify-tsconfig",
-  "include": ["src/**/*.ts", "src/**/*.js"],
   "compilerOptions": {
     "target": "ESNext",
     "module": "ESNext",
@@ -11,5 +10,8 @@
     "esModuleInterop": true,
     "strict": true,
     "skipLibCheck": true
+  },
+  "ts-node": {
+    "files": true
   }
 }