packages,plugins: use backend:build for all backend packages + publish config and no tsconfig

packages/backend-common/package.json

@@ -6,7 +6,9 @@
   "types": "src/index.ts",
   "private": false,
   "publishConfig": {
-    "access": "public"
+    "access": "public",
+    "main": "dist/index.cjs.js",
+    "types": "dist/index.d.ts"
   },
   "homepage": "https://backstage.io",
   "repository": {
@@ -19,7 +21,7 @@
   ],
   "license": "Apache-2.0",
   "scripts": {
-    "build": "backstage-cli build-cache -- tsc",
+    "build": "backstage-cli build --outputs cjs,types",
     "lint": "backstage-cli lint",
     "test": "backstage-cli test",
     "prepack": "backstage-cli prepack",
@@ -50,8 +52,7 @@
     "http-errors": "^1.7.3",
     "jest": "^26.0.1",
     "jest-fetch-mock": "^3.0.3",
-    "supertest": "^4.0.2",
-    "typescript": "^3.9.2"
+    "supertest": "^4.0.2"
   },
   "files": [
     "dist"

packages/backend-common/tsconfig.json

@@ -1,14 +0,0 @@
-{
-  "include": ["src"],
-  "compilerOptions": {
-    "outDir": "dist",
-    "incremental": true,
-    "sourceMap": true,
-    "declaration": true,
-    "strict": true,
-    "target": "ES2019",
-    "module": "commonjs",
-    "esModuleInterop": true,
-    "types": ["node", "jest", "webpack-env"]
-  }
-}