Merge #5271

5271: Add better explanation of UPLOAD_DIR r=jniles a=jmcameron

Based on updates in PR #5269.


Co-authored-by: Jonathan Cameron <jmcameron@gmail.com>

.env.sample

@@ -27,8 +27,10 @@ SESS_SECRET='XopEn BlowFISH'
 # define logging level for the npm debug module.
 DEBUG=app,errors
 
-# define the directory where we will upload reports to.
-# must be writable by the application user
+# define the directory where reports, files, and images will be uploaded.
+# Upload directory requirements:
+#   - Must be writable by the application user.
+#   - Must be a relative directory within the Bhima installation.
 UPLOAD_DIR='client/upload'
 
 # Report directory (Define where reports will be saved on the server)