add email support basics

Author: alainrk

.env.example

@@ -3,24 +3,47 @@ DATABASE_URL='postgres://postgres:postgres@localhost:5432/postgres'
 OPENAI_API_KEY='sk-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
 OPENAI_BASE_URL='https://api.deepseek.com/v1'
 LLM_MODEL='deepseek-chat'
-RUN_MODE='webhook' # webhook or polling
-WEBHOOK_DOMAIN=''
-WEBHOOK_SECRET=''
+RUN_MODE='polling' # webhook or polling
+WEBHOOK_DOMAIN='https://your-domain.ngrok-free.app'
+WEBHOOK_SECRET='your-webhook-secret-here'
 WEBHOOK_HOST='localhost'
 WEBHOOK_PORT='8080'
-LOG_LEVEL='info'
+LOG_LEVEL='debug'
 # Dev purpose, comma separated. Keep it empty to allow all
 ALLOWED_USERS=''
 # Seed purpose - set the Telegram ID of the user to seed transactions for
 SEED_USER_TG_ID=''
+
+# --- OpenTelemetry Configuration ---
+# OTEL_SERVICE_NAME: Name of the service for OpenTelemetry.
+# Default: cashout-telegram-bot
+OTEL_SERVICE_NAME="cashout"
+
+# OTEL_EXPORTER_OTLP_LOGS_ENDPOINT: Endpoint for OTLP log exporter.
+# Default: http://localhost:4318/v1/logs
+# The application currently uses an insecure (HTTP) connection for this endpoint.
+OTEL_EXPORTER_OTLP_LOGS_ENDPOINT="http://localhost:4318/v1/logs"
+
+# OTEL_EXPORTER_OTLP_METRICS_ENDPOINT: Endpoint for OTLP metrics exporter.
+# Default: http://localhost:4318/v1/metrics
+# The application currently uses an insecure (HTTP) connection for this endpoint.
+OTEL_EXPORTER_OTLP_METRICS_ENDPOINT="http://localhost:4318/v1/metrics"
+
 # Web Server Configuration
 WEB_DASHBOARD_URL='http://localhost:8081/web/dashboard'
-WEB_HOST=localhost
+WEB_HOST=127.0.0.1
 WEB_PORT=8081
+
 # Session Configuration (optional)
-SESSION_SECRET=your-random-session-secret-here
+SESSION_SECRET='your-random-session-secret-here'
 SESSION_DURATION_MIN=43200 # 30 days
+
 # Bot Health Check Token
-HEALTH_CHECK_TOKEN=your-secret-token
+HEALTH_CHECK_TOKEN='your-secret-token'
 # Bot Health Check Port
 HEALTH_CHECK_PORT=8082
+
+# Email configuration
+BREVO_API_KEY='xkeysib-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx-xxxxxxxxxxxx'
+EMAIL_FROM_NAME='Cashout App'
+EMAIL_FROM_ADDRESS='noreply@your-domain.com'

go.mod

@@ -14,6 +14,7 @@ require (
 )
 
 require (
+	github.com/getbrevo/brevo-go v1.1.3 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20221227161230-091c0ba34f0a // indirect

go.sum

@@ -6,6 +6,8 @@ github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ3
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/getbrevo/brevo-go v1.1.3 h1:8TYrhhxbfAJLGArlPzCDKzbNfzvjIykBRhTDzLJqmyw=
+github.com/getbrevo/brevo-go v1.1.3/go.mod h1:ExhytIoPxt/cOBl6ZEMeEZNLUKrWEYA5U3hM/8WP2bg=
 github.com/go-co-op/gocron v1.37.0 h1:ZYDJGtQ4OMhTLKOKMIch+/CY70Brbb1dGdooLEhh7b0=
 github.com/go-co-op/gocron v1.37.0/go.mod h1:3L/n6BkO7ABj+TrfSVXLRzsP26zmikL4ISkLQ0O8iNY=
 github.com/google/uuid v1.4.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=