feat: add Telegram bot with notifications and scheduler

Dockerfile

@@ -8,11 +8,13 @@ RUN apk add --no-cache git
 
 # Copy go mod files
 COPY go.mod go.sum ./
-RUN go mod download
 
-# Copy source code
+# Copy source code first to allow go mod tidy
 COPY . .
 
+# Update dependencies
+RUN go mod tidy && go mod download
+
 # Build
 RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main ./cmd/api