Add env vars to Dockerfile

docker/golang.Dockerfile

@@ -19,5 +19,11 @@ RUN apk update && apk add --no-cache ffmpeg
 WORKDIR /app
 # Copy compiled from builder.
 COPY --from=builder /app/whatsapp /app/whatsapp
-# Run the binary.
-ENTRYPOINT ["/app/whatsapp"]
+
+# Set default environment variables for port and webhook
+ENV PORT 3000
+ENV WEBHOOK "http://localhost:3000/handler"
+
+# Use shell form to ensure environment variables are evaluated
+CMD ["sh", "-c", "/app/whatsapp -p ${PORT} -w=${WEBHOOK}"]
+CMD ["/bin/sh", "-c", "/app/whatsapp --port ${PORT} -w=${WEBHOOK}"]

src/pkg/whatsapp/whatsapp.go

@@ -5,6 +5,14 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"mime"
+	"net/http"
+	"os"
+	"regexp"
+	"strings"
+	"sync/atomic"
+	"time"
+
 	"github.com/aldinokemal/go-whatsapp-web-multidevice/config"
 	"github.com/aldinokemal/go-whatsapp-web-multidevice/internal/websocket"
 	pkgError "github.com/aldinokemal/go-whatsapp-web-multidevice/pkg/error"
@@ -19,13 +27,6 @@ import (
 	"go.mau.fi/whatsmeow/types/events"
 	waLog "go.mau.fi/whatsmeow/util/log"
 	"google.golang.org/protobuf/proto"
-	"mime"
-	"net/http"
-	"os"
-	"regexp"
-	"strings"
-	"sync/atomic"
-	"time"
 )
 
 var (