chore: add copyright headers

Make sure we obey the REUSE (https://reuse.software) specification and the
origin, copyright owner, and license of all files are clearly marked.

The whole project is under the EPL-2.0, except for trivial files where copyright
is not applicable that are marked with the CC0-1.0 license. Moreover, code
included from third parties is also available under the respective license.

chore: add CONTRIBUTORS.md

List all authors and supporting organizations in accordance with the REUSE
specification.

1 files changed, 15 insertions, 0 deletions

diff --git a/package.json b/package.json
index 2da37157..c714ecd0 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,22 @@
 {
+  "//": [
+    "SPDX-FileCopyrightText: 2021-2023 The Refinery Authors <https://refinery.tools/>",
+    "",
+    "SPDX-License-Identifier: EPL-2.0"
+  ],
   "name": "@refinery/root",
   "version": "0.0.0",
   "private": true,
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/graphs4value/refinery.git"
+  },
+  "author": "The Refinery Authors <https://refinery.tools/>",
+  "license": "EPL-2.0",
+  "bugs": {
+    "url": "https://github.com/graphs4value/refinery/issues"
+  },
+  "homepage": "https://refinery.tools",
   "workspaces": [
     "subprojects/frontend"
   ],