try to allow background process

cordova/config.xml.in

@@ -13,6 +13,7 @@
   </author>
   <content src="https://safechat.ch" />
   <plugin name="cordova-plugin-whitelist" version="1" />
+  <plugin name="de.appplant.cordova.plugin.background-mode" />
   <access origin="https://safechat.ch" subdomains="true" />
   <access origin="https://dev.marc.waeckerlin.org" subdomains="true" />
   <allow-intent href="http://*/*" />

cordova/makefile.am

@@ -20,6 +20,7 @@ ${ANDROID_SRC}:
 	      chmod -R u+w "$${file}" ); \
 	done
 	if [ "$$(whoami)" != "root" ]; then \
+	  cordova plugin add https://github.com/katzer/cordova-plugin-background-mode.git; \
 	  cordova build --debug || cordova build --debug; \
 	fi