fix(magnum): add missing helm image
diff --git a/images/helm/Earthfile b/images/helm/Earthfile
new file mode 100644
index 0000000..6809e37
--- /dev/null
+++ b/images/helm/Earthfile
@@ -0,0 +1,12 @@
+VERSION 0.7
+
+binary:
+  FROM curlimages/curl:7.78.0
+  ARG TARGETOS
+  ARG TARGETARCH
+  ARG VERSION=3.14.0
+  WORKDIR /tmp
+  RUN curl -LO https://get.helm.sh/helm-v3.14.0-${TARGETOS}-${TARGETARCH}.tar.gz
+  RUN tar -zxvf /tmp/helm-v3.14.0-${TARGETOS}-${TARGETARCH}.tar.gz
+  RUN ${TARGETOS}-${TARGETARCH}/helm version
+  SAVE ARTIFACT ${TARGETOS}-${TARGETARCH}/helm