Update page 'Home'

Home.md

@@ -4,6 +4,56 @@ See [README.md](src/master/README.md)
 
 ## FAQ
 
+### Using SSL with Letsencrypt
+
+ - ``HTTP_HOST`` in ``.env`` should be set to a valid hostname (i.e. no localhost or IP address)
+ - comment out ``web`` container, uncomment ``web-ssl`` in ``docker-compose.yml``
+ - ``SELF_URL_PATH`` in ``.env`` should not include a port as the container is going to use default https port
+ - ports 80 and 443 should be externally accessible i.e. not blocked by firewall and/or conflicting with host services
+
+### How do I add plugins and themes?
+
+By default, tt-rss code is stored on a persistent docker volume (``app``). You can find
+its location like this:
+
+```sh
+docker volume inspect ttrss-docker_app | grep Mountpoint
+```
+
+Alternatively, you can mount any host directory as ``/var/www/html`` by updating ``docker-compose.yml``, i.e.:
+
+```yml
+volumes:
+      - app:/var/www/html
+```
+
+Replace with:
+
+```yml
+volumes:
+      - /opt/tt-rss:/var/www/html
+```
+
+Copy and/or git clone any third party plugins into ``plugins.local`` as usual.
+
+### How do I put this container behind a reverse proxy?
+
+A common pattern is shared nginx doing SSL termination, etc.
+
+```nginx
+   location /tt-rss/ {
+      proxy_set_header Host $host;
+      proxy_set_header X-Real-IP $remote_addr;
+      proxy_set_header X-Forwarded-For $remote_addr;
+      proxy_set_header X-Forwarded-Proto $scheme;
+
+      proxy_pass http://127.0.0.1:8280/tt-rss/;
+      break;
+   }
+```
+
+You will need to set ``SELF_URL_PATH`` to a correct (i.e. visible from the outside) value in the ``.env`` file.
+
 ### Stock Caddy container doesn't work on Raspberry Pi
 
 See this thread https://community.tt-rss.org/t/cant-install-ttrss-on-a-raspberry-pi-4-with-docker/3135