Add link to PGP tutorial in chatbox

docker-compose.yml

@@ -37,6 +37,7 @@ services:
     command: python3 manage.py clean_orders
     volumes:
       - .:/usr/src/robosats
+      - /mnt/development/lnd:/lnd
     network_mode: service:tor
 
   follow-invoices:
@@ -71,7 +72,6 @@ services:
       REDIS_URL: redis://localhost:6379
     volumes:
       - .:/usr/src/robosats
-      - /mnt/development/database:/usr/src/database
     network_mode: service:tor
 
   tor:

frontend/src/components/Chat.js

@@ -111,7 +111,9 @@ export default class Chat extends Component {
                 </Grid>
               </Grid>
             </form>
-            <FormHelperText>This chat has no memory. If you leave and come back the messages are lost.</FormHelperText>
+            <FormHelperText>
+              The chat has no memory: if you leave, messages are lost. <a target="_blank" href="https://diverter.hostyourown.tools/as-easy-as-pgp/"> Learn easy PGP encryption.</a>
+            </FormHelperText>
       </Container>
     )
   }