Rename log url prefix (modmail-dev#39)

* Update app.py

* Update env.example

Author: Taaku18

app.py

@@ -13,7 +13,12 @@
 from core.models import LogEntry
 from core.utils import get_stack_variable, authrequired, User
 
-prefix = os.getenv("URL_PREFIX", "/logs")
+if "URL_PREFIX" in os.environ:
+    print("Using the legacy config var `URL_PREFIX`, rename it to `LOG_URL_PREFIX`")
+    prefix = os.environ["URL_PREFIX"]
+else:
+    prefix = os.getenv("LOG_URL_PREFIX", "/logs")
+
 if prefix == "NONE":
     prefix = ""
 

env.example

@@ -1,4 +1,4 @@
 MONGO_URI=mongodb+srv://urihere 
-URL_PREFIX=/logs    
+LOG_URL_PREFIX=/logs    
 HOST=0.0.0.0
 PORT=8000