Added target to make a script binary

Guide/scripts.markdown

@@ -63,3 +63,13 @@ Hello World, C!
 This is made possible because of the [she-bang line](https://en.wikipedia.org/wiki/Shebang_%28Unix%29) `#!/usr/bin/env run-script` at the top of the task file.
 
 In case you get a permission error, try to add the executable flag via `chmod +x Application/Script/HelloWorldToAllUsers.hs`.
+
+## Building a script
+
+In production you might want to build a script to a binary for performance reasons. Use make like this:
+
+```bash
+make build/bin/Script/HelloWorldToAllUsers
+```
+
+This will produce a binary `build/bin/Script/HelloWorldToAllUsers` from the source file `Application/Script/HelloWorldToAllUsers.hs`.

lib/IHP/Makefile.dist

@@ -158,3 +158,14 @@ ifneq ($(wildcard IHP/.*),)
 else
 	ln -s ${IHP_LIB} build/ihp-lib
 endif
+
+build/bin/Script/%: build/Script/Main/%.hs
+	mkdir -p build/bin/Script
+	ghc -O2 ${GHC_OPTIONS} ${PROD_GHC_OPTIONS} $< -o $@ -odir build/Script -hidir build/Script
+
+build/Script/Main/%.hs: Application/Script/%.hs
+	mkdir -p build/Script/Main
+	echo "module Main (main) where" > $@
+	echo "import IHP.ScriptSupport" >> $@
+	echo "import Application.Script.$* (run)" >> $@
+	echo "main = runScript run" >> $@