Added basic formula to install Apache

apache/init.sls

@@ -0,0 +1,13 @@
+{% set pkg = salt['grains.filter_by']({
+  'Debian': {'name': 'apache2'},
+  'RedHat': {'name': 'httpd'},
+}) %}
+
+apache:
+  pkg:
+    - installed
+    - name: {{ pkg.name }}
+  service:
+    - running
+    - name: {{ pkg.name }}
+    - enable: True