redisigned bookstack compose

Docker/bookstack/.env

@@ -1,14 +1,14 @@
 # Password for bookstack MySQL user
-DB_PASS=<your_strong_pass>
+DB_USER_PASS=<your_strong_pass>
 
 # Password for root MySQL user
 DB_ROOT_PASS=<your_strongest_pass>
 
 # Directory, where the bookstack itself will store the files
-CONFIG_PATH=/path/to/bookstack/config
+PATH_TO_CONFIG=/path/to/bookstack/config
 
 # Directory, where MySQL data will be stored
-DB_DATA=/path/to/db/data
+PATH_TO_DB=/path/to/db/data
 
 # Your timezone
 TZ=Europe/Warsaw