fixed Dockerfile

Dockerfile

@@ -1,10 +1,14 @@
 FROM alpine:3.19
 
-# Install kubectl and helm
-RUN apk add --no-cache curl bash ca-certificates && \
-    curl -LO "https://dl.k8s.io/release/$(curl -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl" && \
+RUN apk add --no-cache curl bash ca-certificates
+
+# Install kubectl
+RUN KUBECTL_VERSION=$(curl -s https://dl.k8s.io/release/stable.txt) && \
+    curl -LO https://dl.k8s.io/release/${KUBECTL_VERSION}/bin/linux/amd64/kubectl && \
     install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl && \
-    rm kubectl && \
-    curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
+    rm kubectl
+
+# Install Helm
+RUN curl -fsSL https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash
 
 ENTRYPOINT ["/bin/sh"]