Add readme

README.md

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-# R-SSH
+# R-SSH
+
+## What can the program do?
+This program allows you to quickly and safely forward local port without configuring the infrastructure.
+
+Features:
+1. Unique static subdomain based on public key fingerprint (md5).
+2. Standard ssh clients are supported.
+3. Supported http and https forwarding.
+4. Automatic header correction for Host, Origin.
+5. Supports X-Forwarded-For, X-Forwarded-Host, X-Forwarded-Proto.
+
+## What does it take to work?
+
+1. SSH client.
+2. Public key (for authorization).
+3. Running **r-ssh** server (you can use public server - **r-ssh.me**).
+
+##How to use?
+
+### Syntax
+
+
+```sh
+ssh -R [domain[+flags]:]<port>:target_domain:target_port r-ssh.me
+```
+
+**domain** - The domain to which requests will be redirected (`Host` and `Origin` headers will be replaced by this value if the corresponding flag is enabled) _[optional]_.
+
+**flags** - Flags change the logic of port forwarding. _[optional]_
+
+Available flags:
+1. **s** - redirect https
+2. **o** - automatically fix `Origin` header (see **domain**)
+
+**port** - Optional for **r-ssh**, but mandatory for ssh client. Affects only the link generated by r-ssh. By default, port 80 is not included in the link.
+
+**target_domain** - Server to which requests will be redirected
+**target_port** - The port to which requests will be redirected
+
+
+#### Examples
+
+Forward local http://localhost:8080/ to web
+
+```sh
+ssh -R 80:localhost:8080 r-ssh.me
+
+# forward "localhost:80" to "https://<fingeprint>.r-ssh.me/"
+```
+
+Forward https://example.com:443/ to web with automatic `Host` correction
+
+```sh
+ssh -R example.com+s:80:example.com:443 r-ssh.me
+
+# forward "example.com+s:80" to "https://example_com-<fingeprint>.r-ssh.me/"
+```
+
+
+#### End-to-end example
+[![asciicast](https://asciinema.org/a/Ykmxb0lOEX0m9YNIXWT3j1SDe.svg)](https://asciinema.org/a/Ykmxb0lOEX0m9YNIXWT3j1SDe)
+
+
+# Self-hosted
+// TODO