feat(mail): ✨ Update mailer configuration and add credentials

Enhances the mailer setup by updating SMTP details to use secure connection and new credentials.

Adds a reference to secret key for email password, improving security for email communication.

template/stacks/forgejo/forgejo-server/values.yaml

@@ -85,6 +85,11 @@ gitea:
         secretKeyRef:
           name: elasticsearch-cloud-credentials
           key: connection-string
+    - name: FORGEJO__mailer__PASSWD
+      valueFrom:
+        secretKeyRef:
+          name: email-user-credentials
+          key: password
 
   admin:
     existingSecret: gitea-credential
@@ -130,10 +135,11 @@ gitea:
 
     mailer:
       ENABLED: true
-      FROM: forgejo@{{{ .Env.DOMAIN_GITEA }}}
-      PROTOCOL: smtp
-      SMTP_ADDR: mailhog.mailhog.svc.cluster.local
-      SMTP_PORT: 1025
+      USER: ipcei-cis-devfw@mms-support.de
+      PROTOCOL: smtps
+      FROM: '"IPCEI CIS DevFW" <ipcei-cis-devfw@mms-support.de>'
+      SMTP_ADDR: mail.mms-support.de
+      SMTP_PORT: 465
 
 service:
   ssh: