add packages

frontend/package.json

@@ -0,0 +1,7 @@
+{
+  "private": true,
+  "workspaces": [
+    "packages/core",
+    "packages/app"
+  ]
+}

frontend/packages/app/package.json

@@ -0,0 +1,9 @@
+{
+    "name": "@backstage/app",
+    "version": "0.0.0",
+    "main": "./src/index.js",
+    "dependencies": {
+        "@backstage/core": "0.0.0",
+        "react": "^16.12.0"
+    }
+}

frontend/packages/app/src/index.js

@@ -0,0 +1,3 @@
+const core = require('@backstage/core');
+
+console.log(core());

frontend/packages/core/package.json

@@ -0,0 +1,5 @@
+{
+    "name": "@backstage/core",
+    "version": "0.0.0",
+    "main": "./src/index.js"
+}

frontend/packages/core/src/index.js

@@ -0,0 +1,3 @@
+module.exports = function () {
+    return "hello world!";
+}

frontend/yarn.lock

@@ -0,0 +1,43 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+"js-tokens@^3.0.0 || ^4.0.0":
+  version "4.0.0"
+  resolved "https://artifactory.spotify.net/artifactory/api/npm/virtual-npm/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
+  integrity sha1-GSA/tZmR35jjoocFDUZHzerzJJk=
+
+loose-envify@^1.1.0, loose-envify@^1.4.0:
+  version "1.4.0"
+  resolved "https://artifactory.spotify.net/artifactory/api/npm/virtual-npm/loose-envify/-/loose-envify-1.4.0.tgz#71ee51fa7be4caec1a63839f7e682d8132d30caf"
+  integrity sha1-ce5R+nvkyuwaY4OffmgtgTLTDK8=
+  dependencies:
+    js-tokens "^3.0.0 || ^4.0.0"
+
+object-assign@^4.1.1:
+  version "4.1.1"
+  resolved "https://artifactory.spotify.net/artifactory/api/npm/virtual-npm/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
+  integrity sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM=
+
+prop-types@^15.6.2:
+  version "15.7.2"
+  resolved "https://artifactory.spotify.net/artifactory/api/npm/virtual-npm/prop-types/-/prop-types-15.7.2.tgz#52c41e75b8c87e72b9d9360e0206b99dcbffa6c5"
+  integrity sha1-UsQedbjIfnK52TYOAga5ncv/psU=
+  dependencies:
+    loose-envify "^1.4.0"
+    object-assign "^4.1.1"
+    react-is "^16.8.1"
+
+react-is@^16.8.1:
+  version "16.12.0"
+  resolved "https://artifactory.spotify.net/artifactory/api/npm/virtual-npm/react-is/-/react-is-16.12.0.tgz#2cc0fe0fba742d97fd527c42a13bec4eeb06241c"
+  integrity sha1-LMD+D7p0LZf9UnxCoTvsTusGJBw=
+
+react@^16.12.0:
+  version "16.12.0"
+  resolved "https://artifactory.spotify.net/artifactory/api/npm/virtual-npm/react/-/react-16.12.0.tgz#0c0a9c6a142429e3614834d5a778e18aa78a0b83"
+  integrity sha1-DAqcahQkKeNhSDTVp3jhiqeKC4M=
+  dependencies:
+    loose-envify "^1.1.0"
+    object-assign "^4.1.1"
+    prop-types "^15.6.2"