Added missing copyrights

Dear @alexlakka

Please review and merge it if agree.

Thx

resources/keycloak.json

 {
+  "copyrightInfo": {
+		"year": "2024",
+		"authors":[
+			"SYNELIXIS"
+			],
+		"text": [
+ 			"Licensed under the Apache License, Version 2.0 (the 'License'); you may not\n",
+ 			"use this file except in compliance with the License.  You may obtain a copy\n",
+ 			"of the License at\n",
+ 			"\n",
+ 			"http://www.apache.org/licenses/LICENSE-2.0\n",
+ 			"\n",
+ 			"Unless required by applicable law or agreed to in writing, software\n",
+ 			"distributed under the License is distributed on an 'AS IS' BASIS, WITHOUT\n",
+ 			"WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the\n",
+ 			"License for the specific language governing permissions and limitations under\n",
+ 			"the License."
+ 			],
+ 		"SPDX-License-Identifier": "Apache-2.0"
+  },
     "protocols": [
       "grpc",
       "grpcs",