Builds the smtp service instead of fetching image

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "smtp"]
+	path = smtp
+	url = git@github.com:abhin4v/docker-smtp.git

docker-compose.yml

@@ -45,7 +45,8 @@ services:
       - ./nginx-log:/var/log/nginx
       - ./certs:/etc/nginx/certs:ro
   smtp:
-    image: namshi/smtp
+    build:
+      context: ./smtp
     environment:
       MAILNAME: space.abhinavsarkar.net
   pihole:

smtp

@@ -0,0 +1 @@
+Subproject commit 49dbeb4b31d136a7f09f32230260d2586359b5c1