[INSTALL] Update for Stack

INSTALL.md

@@ -5,7 +5,7 @@ The `state/` directory contains the database. You can download the current datab
     $ git clone https://github.com/aelve/guide-database
     $ mv guide-database state
 
-The `config.json` file contains the config (it will be created at the 1st start). There are 4 settings so far:
+The `config.json` file contains the config (it will be created at the 1st start). There are 5 settings so far:
 
   * `admin-password` is the password for the admin panel (at `/admin`). Leave it empty if you don't want any password.
 
@@ -15,11 +15,12 @@ The `config.json` file contains the config (it will be created at the 1st start)
 
   * `prerender` enables prerendering pages when the server starts. By default it's disabled (because it's annoying during development).
 
+  * `discuss-url` adds a “discuss this site” link under the header. You can leave it as `null`.
+
 # How to install locally
 
-    $ cabal install --only-dependencies
-    $ cabal build
-    $ dist/build/guide/guide
+    $ stack build
+    $ stack exec guide
 
 And go to <http://localhost:8080>. The status page is available at <http://localhost:5050>; the admin page, at <http://localhost:8080/admin>.
 
@@ -27,25 +28,15 @@ And go to <http://localhost:8080>. The status page is available at <http://local
 
 I'm going to use Digitalocean and Ubuntu, but you can use anything else.
 
-Create a droplet with Ubuntu. Install GHC:
+Create a droplet with Ubuntu. Install Stack (this command will import a GPG key, add Stack's repository, and run `apt-get`):
 
-    $ 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`.
+    $ curl -sSL https://get.haskellstack.org/ | sh
 
 Clone and build `guide`:
 
     $ git clone https://github.com/aelve/guide
     $ cd guide
-    $ cabal update
-    $ cabal install --dependencies-only
-    $ cabal build
+    $ stack build --no-test --no-bench --copy-bins
 
 Make a new subdomain in Apache. For me, it means writing this to `/etc/apache2/sites-available/guide.conf`:
 
@@ -91,7 +82,7 @@ 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
+exec /root/.local/bin/guide
 ~~~
 
 Start the daemon: