Update README.md

Added reference to manual pages and more details

Author: oxdef

README.md

@@ -18,23 +18,32 @@
 
 `lib2opds` is distributed on PyPI. The best way to install it is with [pipx](https://pipx.pypa.io).
 
-```
-pipx install lib2opds
+```shell
+$ pipx install lib2opds
 ```
 
 ## How to use
 
+Please read the manual frist:
+```shell
+$ man lib2opds
 ```
+Let's consider the following library directory:
+```shell
 $ tree ./test-library/
 ./test-library/
 ├── Linux
 │   └── How Linux Works - Brian Ward.epub
 └── Science Fiction
     ├── All Systems Red.epub
     └── I, Robot - Isaac Asimov.epub
-
+```
+Generate OPDS catalog and complimenting HTML site for the library directory: 
+```shell
 $ lib2opds --opds-base-uri "/opds/" --library-base-uri "/library/" --library-dir "./test-library" --opds-dir "./output" --generate-site-xslt
-
+```
+Get the following result:
+```shell
 $ tree ./output/
 ./output/
 
@@ -54,9 +63,9 @@ $ tree ./output/
 └── index.xml
 ```
 
-`/etc/lib2opds.ini` is used by default and options can be overridden via command line arguments.
+`/etc/lib2opds.ini` is used by default and options can be overridden via command line arguments. See `$ man 5 lib2opds.ini` for more details.
 
-Example of configuration file for Nginx with HTTP Basic Authentication:
+Now it is possible to serve it with any HTTP server. Example of configuration file for Nginx with HTTP Basic Authentication:
 
 ```nginx
 location /library {