archive: put only `ils` directory in archive

Co-Authored-by: Olivier DOSSMANN <git@dossmann.net>

Makefile

@@ -5,13 +5,18 @@ all: static.tar.gz static-pilot.tar.gz
 static.tar.gz:
 	$Qmkdir static
 	$Qcp -r ils static/
-	$Qtar cfz static.tar.gz static/
+	$Qcd static/
+	$Qtar cfz static.tar.gz ils/
+	$Qcd - > /dev/null 2>&1
 
 static-pilot.tar.gz: logo-global.pilot.png
 	$Qmkdir static-pilot
 	$Qcp -r ils static-pilot/
 	$Qcp logo-global.pilot.png static-pilot/ils/images/logo-global.png
-	$Qtar cfz static-pilot.tar.gz static-pilot/
+	$Qcd static-pilot/
+	$Qtar cfz static-pilot.tar.gz ils/
+	$Qcd - > /dev/null 2>&1
+
 
 clean:
 	$Qrm -rf static/ static-pilot/ static.tar.gz static-pilot.tar.gz

README.md

@@ -0,0 +1,11 @@
+# HOWTO
+
+```
+make clean
+make
+```
+
+generates:
+
+  * static.tar.gz: files for all rero-ils instances
+  * static.tar.gz: files for rero-ils **pilot** instance (with a specific logo-global.png file)