Added basic loaders/files/dirs

src/loaders/express.ts

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+import { Application } from "express";
+/**
+ * Loader for express related configurations.
+ * Configures proxy trusts, globally used middlewares and other express features.
+ */
+export default async (app: Application) => {
+	app.enable('trust proxy');
+	app.disable('x-powered-by');
+	app.disable('x-served-by');
+	return app;
+};

src/loaders/index.ts

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+import { Application } from "express";
+import expressLoader from "./express";
+import openapiLoader from "./openapi";
+
+/**
+ * Index Loader that executes the other loaders in the right order.
+ * This basicly exists for abstraction and a overall better dev experience.
+ */
+export default async (app: Application) => {
+    await openapiLoader(app);
+    await expressLoader(app);
+    return app;
+};

src/loaders/openapi.ts

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+import { validationMetadatasToSchemas } from "@odit/class-validator-jsonschema";
+import express, { Application } from "express";
+import path from 'path';
+import { getMetadataArgsStorage } from "routing-controllers";
+import { generateSpec } from '../apispec';
+
+/**
+ * Loader for everything openapi related - from creating the schema to serving it via a static route and swaggerUiExpress.
+ * All auth schema related stuff also has to be configured here
+ */
+export default async (app: Application) => {
+  const storage = getMetadataArgsStorage();
+  const schemas = validationMetadatasToSchemas({
+    refPointerPrefix: "#/components/schemas/",
+  });
+
+  //Spec creation based on the previously created schemas
+  const spec = generateSpec(storage, schemas);
+  app.get(["/docs/openapi.json", "/docs/swagger.json"], (req, res) => {
+    res.json(spec);
+  });
+  app.use('/docs', express.static(path.join(__dirname, '../static/docs'), { index: "index.html", extensions: ['html'] }));
+  return app;
+};