Documentation update

README.md

@@ -11,17 +11,34 @@ original files on the server.
 Copy the `generated_files` folder to the server and from there run the
 script.
 
+## Dependencies
+- texlive-xetex
+- python3-pypdf2
+
 ## Config file
-The program requires a config file called `cred.cfg` that stores some
-paths and the data for accessing the database. It should contain the
-following fields:
+The program requires a config file that stores some paths and, if a
+postgres database is used, the credentials for it. If several
+publication platforms are used, simply create different config files
+for each instance.
+
+It should contain at least the following fields:
 
 ```
 [server]
 media_dir:
 production_url:
+```
+When using SQLite, you can specify the database file like this:
+
+```
+[sqlite]
+database_file:
+```
 
-[database]
+Insert the postgres database credentials like this:
+
+```
+[postgres]
 database_name:
 user:
 host: