feat(email): SMTP via gen_smtp and CalenTIQ HTML templates. Refs EventHub/EventHubBack#68

rebar.config

@@ -10,7 +10,8 @@
     {meck, "0.9.2"},
     {gun, "2.2.0"},
     {prometheus_cowboy, "0.2.0"},
-    {cowboy_swagger, "2.8.0"}
+    {cowboy_swagger, "2.8.0"},
+    {gen_smtp, "1.3.0"}
 ]}.
 
 {shell, [
@@ -27,7 +28,7 @@
 {profiles, [
     {prod, [
         {relx, [
-            {release, {eventhub, "0.0.1"}, [eventhub, sasl,cowboy, jose, jsx, argon2, runtime_tools, os_mon, prometheus_cowboy]},
+            {release, {eventhub, "0.0.1"}, [eventhub, sasl, cowboy, jose, jsx, argon2, gen_smtp, ssl, runtime_tools, os_mon, prometheus_cowboy]},
             {include_erts, true},
             {extended_start_script, true},
             {sys_config, "./src/config/sys.config"}