inventaire: local config: fix hostname

inventaire being the server hostname within the docker container

inventaire/docker-entrypoint.sh

@@ -7,6 +7,7 @@ cd /opt/inventaire
 # Overwrite the local-${NODE_ENV} config with environment variables every time the container is restarted
 cat > "./config/local-${NODE_ENV}.cjs" << EOF
 module.exports = {
+  hostname: 'inventaire',
   port: '${INVENTAIRE_PORT}',
   publicHostname: '${PUBLIC_HOSTNAME}',
   instanceName: '${INSTANCE_NAME}',