app-backend: initial port to new backend system

Co-authored-by: Fredrik Adelöw <freben@gmail.com>
Co-authored-by: Johan Haals <johan.haals@gmail.com>
Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

plugins/app-backend/package.json

@@ -8,7 +8,8 @@
   "publishConfig": {
     "access": "public",
     "main": "dist/index.cjs.js",
-    "types": "dist/index.d.ts"
+    "types": "dist/index.d.ts",
+    "alphaTypes": "dist/index.alpha.d.ts"
   },
   "backstage": {
     "role": "backend-plugin"
@@ -24,7 +25,7 @@
   ],
   "scripts": {
     "start": "backstage-cli package start",
-    "build": "backstage-cli package build",
+    "build": "backstage-cli package build --experimental-type-build",
     "lint": "backstage-cli package lint",
     "test": "backstage-cli package test",
     "prepack": "backstage-cli package prepack",
@@ -33,6 +34,7 @@
   },
   "dependencies": {
     "@backstage/backend-common": "workspace:^",
+    "@backstage/backend-plugin-api": "workspace:^",
     "@backstage/config": "workspace:^",
     "@backstage/config-loader": "workspace:^",
     "@backstage/types": "workspace:^",
@@ -49,16 +51,20 @@
     "yn": "^4.0.0"
   },
   "devDependencies": {
+    "@backstage/backend-app-api": "workspace:^",
     "@backstage/backend-test-utils": "workspace:^",
     "@backstage/cli": "workspace:^",
     "@backstage/types": "workspace:^",
     "@types/supertest": "^2.0.8",
+    "get-port": "^6.1.2",
     "mock-fs": "^5.1.0",
     "msw": "^0.47.0",
+    "node-fetch": "^2.6.7",
     "supertest": "^6.1.3"
   },
   "files": [
     "dist",
+    "alpha",
     "migrations/**/*.{js,d.ts}",
     "static"
   ]