Implement mail service with configuration and settings management

Docker/.env

@@ -0,0 +1,7 @@
+MAIL_HOST=smtp.example.com
+MAIL_PORT=587
+MAIL_USERNAME=your_username
+MAIL_PASSWORD=your_password
+MAIL_FROM_ADDRESS=noreply@example.com
+MAIL_FROM_NAME="FS Einarbeitungen Musterhausen"
+MAIL_USE_SSL=true

Docker/docker-compose.yml

@@ -5,6 +5,17 @@ services:
     image: ghcr.io/troogs/fs-onboarding/server:latest
     ports:
       - "8100:56000"
+    env_file:
+      - .env
+    environment:
+      # Mail Configuration Examples. These override options in appsettings.json.
+      # All values below can also be set via the active .env file or appsettings.json.
+      - Settings__Mail__Host=${MAIL_HOST:-smtp.example.com}
+      - Settings__Mail__Port=${MAIL_PORT:-587}
+      - Settings__Mail__Username=${MAIL_USERNAME:-your_username}
+      - Settings__Mail__Password=${MAIL_PASSWORD:-your_password}
+      - Settings__Mail__FromAddress=${MAIL_FROM_ADDRESS:-no-reply@example.com}
+      - Settings__Mail__UseSsl=${MAIL_USE_SSL:-true}
     volumes:
       - /docker/data/fs-onboarding/config:/app/config/
       - /docker/data/fs-onboarding/data:/app/data/