stack: add page (#1509)

pages/common/stack.md

@@ -0,0 +1,27 @@
+# stack
+
+> Tool for managing haskell projects.
+
+- Create a new project:
+
+`stack new {{project_name}}`
+
+- Install all packages needed by a project:
+
+`stack install`
+
+- Compile a project:
+
+`stack build`
+
+- Run tests inside a project:
+
+`stack test`
+
+- Compile a project and re-compile every time a file changes:
+
+`stack build --file-watch`
+
+- Compile a project and execute a command after compilation:
+
+`stack build --exec "{{command}}"`