feat: prepare CI

tools/print-docker-tag.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+# Will print a docker tag with a version based on the current git branch and tag
+# e.g.: geonetwork/geonetwork-ui-my-app:1.0.0-RC2
+# or: geonetwork/geonetwork-ui-my-app:feature-branch
+
+appName=$1
+gitTag=$(git describe --exact-match --tags 2>/dev/null | sed "s/^v//") # remove "v" in front of version if any
+gitBranch=$(git symbolic-ref --short HEAD)
+gitRef=$(git rev-parse --short HEAD)
+dockerTag=${gitTag:-${gitBranch}}
+if [ ${dockerTag} == "main" ]; then
+  dockerTag=${dockerTag}-${gitRef}
+fi
+
+echo "ghcr.io/camptocamp/mel-dataplatform/${appName}:${dockerTag}"