Update Dockerfile

Dockerfile

@@ -40,9 +40,9 @@ RUN . /etc/os-release \
     && apt-get clean
 RUN export ARCHNAME="$(dpkg --print-architecture)" ; \
     if [ "${ARCHNAME}" = "amd64" ] ; then \
-        wget "${BALENA_CLI_URL}" -O balena.zip ; \
+        wget "${BALENA_CLI_URL}" -O balena-cli.zip ; \
         mkdir -p /opt ; \
-        unzip balena.zip -d /opt ; \
-        rm balena.zip ; \
+        unzip balena-cli.zip -d /opt ; \
+        rm balena-cli.zip ; \
         echo "export PATH=\$PATH:/opt/balena-cli" >> /etc/environment ; \
     fi
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