Update telegram library, add docs

README.md

@@ -2,10 +2,50 @@
 
 This lets my deranged friend monitor his drunken campground shenanigans from a Telegram bot.
 
+## Usage
+
+Add @robbcampbot to your Telegram group.
+
+Send the `/campcam` command.
+
 ## Installation
 
 ```
-$ pip install --force-reinstall 'python-telegram-bot==v13.15' 'picamera'
+$ sudo raspi-config  # enable the camera
+$ sudo apt install python3 python3-pip python3-virtualenv
 $ git clone https://git.tannercollin.com/tanner/campcam.git
-$ python campcam.py
+$ cd campcam/
+$ virtualenv -p python3 env
+$ . env/bin/activate
+(env) $ pip install -r requirements.txt
+# edit secrets.py.example, save as secrets.py
+(env) $ python campcam.py
+```
+
+## Process Control
+
+```
+$ sudo apt install supervisor
+```
+
+Append to `/etc/supervisor/supervisor.conf`, replace `tanner` with your Linux username:
+
+```
+[program:campcam]
+user=tanner
+directory=/home/tanner/campcam
+command=/home/tanner/campcam/env/bin/python -u campcam.py
+stopsignal=INT
+stopasgroup=true
+killasgroup=true
+autostart=true
+autorestart=true
+stderr_logfile=/var/log/campcam.log
+stderr_logfile_maxbytes=10MB
+stdout_logfile=/var/log/campcam.log
+stdout_logfile_maxbytes=10MB
+```
+
+```
+$ sudo supervisorctl reread; sudo supervisorctl update
 ```