Making README more friendly and readable (#69)

* Making README more friendly and readable

* Info about multiple secrets

* Information about systemd and Docker

README

-to build, simply run 'make'. Your binary will be objs/bin/mtproto-proxy
-
-to run mtproto-proxy:
-  1. Obtain a secret, used to connect to telegram servers. 
-  curl -s https://core.telegram.org/getProxySecret -o proxy-secret
-
-  2. Obtain current telegram configuration. It can change (occasionally), so we encourage you to update it once per day.
-  curl -s https://core.telegram.org/getProxyConfig -o proxy-multi.conf
-
-  3. Generate a secret to be used by users to connect to your proxy
-  head -c 16 /dev/urandom | xxd -ps
-
-  4. Run mtproto-proxy
-        mtproto-proxy -u nobody -p 8888 -H 443 -S <secret> --aes-pwd proxy-secret proxy-multi.conf -M 1
-  where:
-          - nobody is the user name. mtproto-proxy calls setuid() to drop privilegies
-          - 443 is the port, used by clients to connect to the proxy
-          - 8888 is the local port. You can use it to get statistics from mtproto. Like wget localhost:8888/stats
-            You can only get this stat via loopback
-          - <secret> is the secret generated at step 3. 
-          - proxy-secret and proxy-multi.conf are obtained at steps 1 and 2
-          - 1 is the number of workers. You can increase the number of workers, if you have a powerful server
-          - also feel free to check out other options using mtproto-proxy help 
-             
-
-  5. generate the  link tg://proxy?server=SERVER_NAME&port=443&secret=SECRET
-
-  6.  register your proxy with @MTProxybot on Telegram.
-
-  7. enjoy

README.md

+# MTProxy
+To build, simply run `make`. Your binary will be in `objs/bin/mtproto-proxy`. If build was failed, you would do `make clear` at first, before building it again.
+
+To run `mtproto-proxy`:
+1. Obtain a secret, used to connect to telegram servers.
+```bash
+curl -s https://core.telegram.org/getProxySecret -o proxy-secret
+```
+2. Obtain current telegram configuration. It can change (occasionally), so we encourage you to update it once per day.
+```bash
+curl -s https://core.telegram.org/getProxyConfig -o proxy-multi.conf
+```
+3. Generate a secret to be used by users to connect to your proxy.
+```bash
+head -c 16 /dev/urandom | xxd -ps
+```
+4. Run `mtproto-proxy`:
+```bash
+./mtproto-proxy -u nobody -p 8888 -H 443 -S <secret> --aes-pwd proxy-secret proxy-multi.conf -M 1
+```
+... where:
+- `nobody` is the username. `mtproto-proxy` calls `setuid()` to drop privilegies.
+- `443` is the port, used by clients to connect to the proxy.
+- `8888` is the local port. You can use it to get statistics from `mtproto-proxy`. Like `wget localhost:8888/stats`. You can only get this stat via loopback.
+- `<secret>` is the secret generated at step 3. Also you can set multiple secrets: `-S <secret1> -S <secret2>`.
+- `proxy-secret` and `proxy-multi.conf` are obtained at steps 1 and 2.
+- `1` is the number of workers. You can increase the number of workers, if you have a powerful server.
+- also feel free to check out other options using `mtproto-proxy --help`.
+
+5. Generate the link with followed schema: `tg://proxy?server=SERVER_NAME&port=443&secret=SECRET` (by the way official bot provides links anyway).
+6. Register your proxy with [@MTProxybot](https://t.me/MTProxybot) on Telegram.
+7. Set received tag as param `-P <proxy tag>`
+8. Enjoy.
+
+## Systemd example configuration
+1. Create systemd service file (it's standart path for the most Linux distros, but you should check it before):
+```bash
+sudo nano /etc/systemd/system/MTProxy.service
+```
+2. Edit this basic service (especially paths and params):
+```bash
+[Unit]
+Description=MTProxy
+After=network.target
+
+[Service]
+Type=simple
+WorkingDirectory=/opt/MTProxy/objs/bin
+ExecStart=/opt/MTProxy/objs/bin/mtproto-proxy -u nobody -p 8888 -H 443 -S <secret> -P <tag> [other params]
+Restart=on-failure
+
+[Install]
+WantedBy=multi-user.target
+```
+3. Reload daemons:
+```bash
+sudo systemctl daemon-reload
+```
+4. Test fresh MTProxy service:
+```bash
+sudo systemctl restart MTProxy.service
+# Check status, it should be active
+sudo systemctl status MTProxy.service
+```
+5. Enable it, to autostart service after reboot:
+```bash
+sudo systemctl enable MTProxy.service
+```
+
+## Docker image
+Telegram is also providing [official Docker image](https://hub.docker.com/r/telegrammessenger/proxy/).