diff --git a/Dockerfile b/Dockerfile
index 62c085a..cba8ec0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,7 +14,8 @@ RUN wget https://github.com/libvips/libvips/releases/download/v8.7.3/vips-8.7.3.
     cd vips-8.7.3 && \
     ./configure && \
     make && \
-    make install
+    make install && \
+    go get -v -u github.com/davidbyttow/govips/pkg/vips && \
+    go install -v ./...
 
-RUN go get -v -u github.com/davidbyttow/govips/pkg/vips
-RUN go install -v ./...
+CMD ["image-resizer", "-s", "https://images.example.com/"]
diff --git a/main.go b/main.go
index cddb5ea..eee402a 100644
--- a/main.go
+++ b/main.go
@@ -28,7 +28,7 @@ func main() {
 	defer vips.Shutdown()
 
 	http.HandleFunc("/", resizeHandler)
-	log.Fatal(http.ListenAndServe(listenAddr, nil))
+	log.Fatal(http.ListenAndServe(*listenAddr, nil))
 }
 
 func resizeHandler(w http.ResponseWriter, r *http.Request) {
@@ -67,7 +67,7 @@ func resizeHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	// Start fetching the image from the given url
-	resp, err := http.Get(imgServer + queryUrl)
+	resp, err := http.Get(*imgServer + queryUrl)
 	if err != nil {
 		w.Write([]byte(fmt.Sprintf("failed to get %s: %v", queryUrl, err)))
 		w.WriteHeader(http.StatusBadRequest)