Revise code related to detecting client path

backend/globaleaks/settings.py

@@ -8,8 +8,8 @@
 this_directory = os.path.dirname(__file__)
 
 possible_client_paths = [
-    '/usr/share/globaleaks/client/',
-    os.path.abspath(os.path.join(this_directory, '../../client/build/'))
+    os.path.abspath(os.path.join(this_directory, '../../client/build/')),
+    '/usr/share/globaleaks/client'
 ]
 
 
@@ -36,6 +36,7 @@ def __init__(self):
 
         self.ramdisk_path = '/dev/shm/globaleaks'
         self.working_path = '/var/globaleaks'
+        self.client_path = None
 
         self.authentication_lifetime = 120
 
@@ -98,13 +99,12 @@ def eval_paths(self):
         self.accesslogfile = os.path.abspath(os.path.join(self.log_path, "access.log"))
 
         # Client path detection
-        possible_client_paths.insert(0, os.path.join(self.working_path, 'client'))
         for path in possible_client_paths:
             if os.path.isfile(os.path.join(path, 'index.html')):
                 self.client_path = path
                 break
 
-        if not self.client_path:
+        if self.client_path is None:
             print("Unable to find a directory to load the client from")
             sys.exit(1)