Publish geoserver packages to Github maven registry

.github/workflows/publish.yaml

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+# Builds and pushes docker images on main and tags
+
+name: Build on any branch
+on:
+  push:
+    branches:
+      - 'main'
+    tags:
+      - '*'
+    paths:
+      - "Makefile"
+      - "pom.xml"
+      - ".github/workflows/build.yaml"
+      - "geoserver/**"
+
+jobs:
+  build:
+    name: Build and publish to github packages
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+      with:
+        submodules: recursive
+    - name: Setup Java
+      uses: actions/setup-java@v4
+      with:
+        distribution: 'temurin'
+        java-version: '17'
+        cache: 'maven'
+
+    - name: Build customized GeoServer version
+      run: |
+        ./mvnw clean install -DskipTests -ntp -T4 -U 
+
+    - name: Publish package
+      run: |
+        ./mvnw --batch-mode deploy -DskipTests -ntp \
+        -DaltDeploymentRepository=github::https://maven.pkg.github.com/camptocamp/geoserver-cloud-geoserver 
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Remove project jars from cached repository
+      run: |
+        rm -rf ~/.m2/repository/org/geoserver
+        find ~/.m2/repository -name "*SNAPSHOT*" -type d | xargs rm -rf {}

.gitignore

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+target
+!.mvn/wrapper/maven-wrapper.properties
+.mvn/wrapper
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### artifact created by test runs, under src/main/webapp on some projects
+### TODO: get rid of them instead by fixing the tests to use in-memory or tmp folder catalogs
+webapp
+
+# https://bugs.openjdk.java.net/browse/JDK-8214300
+.attach_pid*
+
+.flattened-pom.xml
+
+docker-compose_datadir*
+/.metadata/
+
+.vscode

.mvn/wrapper/maven-wrapper.properties

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+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.6/apache-maven-3.9.6-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar

.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>geoserver-cloud-geoserver</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+	</buildSpec>
+	<natures>
+	</natures>
+</projectDescription>