Fixed downloading of yq

Dockerfile

@@ -1,3 +1,18 @@
+FROM alpine as curl
+
+WORKDIR /
+
+RUN apk add curl
+
+FROM curl as yq-downloader
+
+ARG OS=${TARGETOS:-linux}
+ARG ARCH=${TARGETARCH:-amd64}
+ARG YQ_VERSION="v4.4.1"
+ARG YQ_BINARY="yq_${OS}_$ARCH"
+RUN curl "https://github.com/mikefarah/yq/releases/download/$YQ_VERSION/$YQ_BINARY" -o /usr/local/bin/yq && \
+    chmod +x /usr/local/bin/yq
+
 FROM ubuntu:focal
 
 RUN apt-get update && \
@@ -16,13 +31,6 @@ RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \
     xmlstarlet \
     && rm -rf /var/lib/apt/lists/*
 
-ARG OS=${TARGETOS:-linux}
-ARG ARCH=${TARGETARCH:-amd64}
-ARG YQ_VERSION="v4.6.0"
-ARG YQ_BINARY="yq_${OS}_$ARCH"
-RUN wget "https://github.com/mikefarah/yq/releases/download/$YQ_VERSION/$YQ_BINARY" -O /usr/local/bin/yq && \
-    chmod +x /usr/local/bin/yq
-
 WORKDIR /app
 
 COPY dep-bootstrap.sh .
@@ -33,6 +41,8 @@ RUN mkdir -p /home/jenkins
 RUN chown 1000:1000 /home/jenkins
 ENV JENKINS_USER=jenkins
 
+COPY --from=yq-downloader --chown=1000:1000 /usr/local/bin/yq /usr/local/bin/yq
+
 USER 1000
 
 RUN ./dep-bootstrap.sh 0.4.1 install