Add installation instructions

INSTALL.md

@@ -0,0 +1,66 @@
+# How to install locally
+
+    $ cabal install --only-dependencies
+    $ cabal build
+    $ dist/build/guide/guide
+
+And go to <http://localhost:8080>.
+
+# How to install on a server
+
+I'm going to use Digitalocean and Ubuntu, but you can use anything else.
+
+Create a droplet with Ubuntu. Install GHC:
+
+    $ add-apt-repository ppa:hvr/ghc
+    $ apt-get update
+    $ apt-get install ghc-7.10.3 cabal-install-1.22
+
+Add cabal-install, GHC, and the cabal dir to `PATH` by adding
+
+    /opt/cabal/1.22/bin:/opt/ghc/7.10.3/bin:$HOME/.cabal/bin
+
+to `PATH` in `~/.bashrc` and then doing `source ~/.bashrc`.
+
+Clone and build `guide`:
+
+    $ git clone https://github.com/aelve/guide
+    $ cd guide
+    $ cabal update
+    $ cabal install --dependencies-only
+    $ cabal build
+
+Delete the contents of `static/tracking.html` (because otherwise information about visits will be sent to me):
+
+    $ truncate -s 0 static/tracking.html
+
+Make a new subdomain in Apache. For me, it means writing this to `/etc/apache2/sites-available/guide.conf`:
+
+~~~
+<VirtualHost *:80>
+  ServerName guide.aelve.com
+
+  ProxyPreserveHost On
+  ProxyPass / http://0.0.0.0:8080/
+  ProxyPassReverse / http://0.0.0.0:8080/
+</VirtualHost>
+~~~
+
+Enable the site:
+
+    $ a2ensite guide
+    $ service apache2 reload
+
+Create a daemon. This goes to `/etc/init/guide.conf` (the path is going to be something other than `/root/guide` for you):
+
+~~~
+start on filesystem or runlevel [2345]
+stop on runlevel [!2345]
+chdir /root/guide
+env LC_ALL=en_US.UTF-8
+exec dist/build/guide/guide
+~~~
+
+And start the daemon:
+
+    $ service guide start

README.md

@@ -2,3 +2,5 @@
 
 [![Build status](https://secure.travis-ci.org/aelve/guide.svg)](https://travis-ci.org/aelve/guide)
 [![BSD3 license](https://img.shields.io/badge/license-BSD3-blue.svg)](https://github.com/aelve/guide/blob/master/LICENSE)
+
+Installation instructions are here: [INSTALL.md](INSTALL.md).