Change example volume path in docker-compose files

- The previous setting did override the default Limesurvey directories
  - Also added a hint to the README

README.md

@@ -29,7 +29,9 @@ LimeSurvey requires an external database (MySQL, PostgreSQL) to run. See *docker
 
 To preserve the uploaded files assign the upload folder into a volume. See *docker-compose.yml* for example.
 
-Path: */var/www/html/upload/*
+Path: */var/www/html/upload/surveys*
+
+**Hint**: The mounted directory must be owned by the webserver user (e.g. www-data)
 
 # LimeSurvey Configuration
 

docker-compose.fpm.alpine.yml

@@ -5,7 +5,7 @@ services:
       context: fpm-alpine/
       dockerfile: Dockerfile
     volumes:
-      - /tmp/upload/:/var/www/html/upload/
+      - /tmp/upload/surveys:/var/www/html/upload/surveys
       - lime:/var/www/html
     links:
       - lime-db

docker-compose.fpm.yml

@@ -5,7 +5,7 @@ services:
       context: fpm/
       dockerfile: Dockerfile
     volumes:
-      - /tmp/upload/:/var/www/html/upload/
+      - /tmp/upload/surveys:/var/www/html/upload/surveys
       - lime:/var/www/html
     links:
       - lime-db

docker-compose.pgsql.yml

@@ -5,7 +5,7 @@ services:
       context: apache/
       dockerfile: Dockerfile
     volumes:
-      - /tmp/upload/:/var/www/html/upload/
+      - /tmp/upload/surveys:/var/www/html/upload/surveys
     links:
       - lime-db
     depends_on:

docker-compose.yml

@@ -5,7 +5,7 @@ services:
       context: apache/
       dockerfile: Dockerfile
     volumes:
-      - /tmp/upload/:/var/www/html/upload/
+      - /tmp/upload/surveys:/var/www/html/upload/surveys
     links:
       - lime-db
     depends_on: