Build correct docker file

Dockerfile

@@ -10,9 +10,12 @@ ARG cli_version=v0.10
 
 # Install required packages and latest ${cli_version} version of Infracost
 RUN apk --update --no-cache add ca-certificates openssl openssh-client curl git jq
+
+# Download and install the correct Infracost binary based on the target architecture
+ARG TARGETARCH
 RUN \
-  curl -s -L "https://infracost.io/downloads/$cli_version/infracost-linux-amd64.tar.gz" | tar xz -C /tmp && \
-  mv /tmp/infracost-linux-amd64 /usr/bin/infracost
+  curl -s -L "https://infracost.io/downloads/$cli_version/infracost-linux-${TARGETARCH}.tar.gz" | tar xz -C /tmp && \
+  mv /tmp/infracost-linux-${TARGETARCH} /usr/bin/infracost
 
 ### Legacy logic - not needed for new users
 # The following logic is to support older infracost-atlantis users that used the atlantis_diff.sh script and compost.