pkg/recipe: Add fake smtp server

Add recipe for using a mock mailserver for viewing emails sent by the
satellite.

Change-Id: Ied486315dc60320c39a945f4a71fcda8d4efa7a0

README.md

@@ -66,6 +66,9 @@ storj-up <subcommand> <selector> <argument>
 
 Here `selector` can be either a service (like `storagenode`) or a name of a service group. (like `edge`). To find out all the groups, please use `storj-up recipes`
 
+Other services include:
+* `mailserver`: a mock smtp server that can be used to view emails sent from the satellite at localhost:1080
+
 ### Example: Building specific binaries based on a Gerrit change
 
 After running `storj-up init`, you can use the following command to replace binaries based on a specific Gerrit changeset:

pkg/recipe/default.go

@@ -46,6 +46,9 @@ var repair []byte
 //go:embed audit.yaml
 var audit []byte
 
+//go:embed mailserver.yaml
+var mailserver []byte
+
 // Defaults is a map for recipes included in the binary.
 var Defaults = map[string][]byte{
 	"minimal":         minimal,
@@ -61,4 +64,5 @@ var Defaults = map[string][]byte{
 	"uplink":          uplink,
 	"repair":          repair,
 	"audit":           audit,
+	"mailserver":      mailserver,
 }

pkg/recipe/mailserver.yaml

@@ -0,0 +1,19 @@
+name: mailserver
+description: mock smtp server for seeing emails sent from the satellite
+add:
+  - name: mailserver
+    containername: mailserver
+    image: haravich/fake-smtp-server
+    port:
+      - name: webui
+        target: 1080
+      - name: smtp
+        target: 1025
+modify:
+  - match:
+      label:
+        - core
+    flag:
+      add:
+        - --mail.smtp-server-address=mailserver:1025
+        - --mail.auth-type=insecure