fix(pkg): add inline EPEL repo configuration for Amazon Linux 2

Author: myii

Diff for: nginx/pkg.sls

@@ -113,6 +113,22 @@ nginx_zypp_repo:
 {% endif %}
 
 {% if salt['grains.get']('os_family') == 'RedHat' %}
+{%   if salt['grains.get']('osfinger', '') in ['Amazon Linux-2'] %}
+nginx_epel_repo:
+  pkgrepo.managed:
+    - name: epel
+    - humanname: Extra Packages for Enterprise Linux 7 - $basearch
+    - mirrorlist: https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=$basearch
+    - enabled: 1
+    - gpgcheck: 1
+    - gpgkey: https://dl.fedoraproject.org/pub/epel/RPM-GPG-KEY-EPEL-7
+    - failovermethod: priority
+    - require_in:
+      - pkg: nginx_install
+    - watch_in:
+      - pkg: nginx_install
+{%   endif %}
+
 nginx_yum_repo:
   pkgrepo:
     {%- if from_official %}