Fix dockerfile

Dockerfile

@@ -23,6 +23,12 @@ COPY . .
 # Set Tamago path for Make rule.
 ENV TAMAGO=/usr/local/tamago-go/bin/go
 
+# The Makefile expects verifiers to be stored in files, so do that.
+RUN echo "${APPLET_PUBLIC_KEY}" > /tmp/applet.pub
+RUN echo "${LOG_PUBLIC_KEY}" > /tmp/log.pub
+RUN echo "${OS_PUBLIC_KEY1}" > /tmp/os1.pub
+RUN echo "${OS_PUBLIC_KEY2}" > /tmp/os2.pub
+
 # Firmware transparency parameters for output binary.
 ENV FT_LOG_URL=${FT_LOG_URL} \
     FT_BIN_URL=${FT_BIN_URL} \
@@ -33,8 +39,4 @@ ENV FT_LOG_URL=${FT_LOG_URL} \
     OS_PUBLIC_KEY2="/tmp/os2.pub" \
     GIT_SEMVER_TAG=${GIT_SEMVER_TAG}
 
-RUN echo "${APPLET_PUBLIC_KEY}" > /tmp/applet.pub
-RUN echo "${LOG_PUBLIC_KEY}" > /tmp/log.pub
-RUN echo "${OS_PUBLIC_KEY1}" > /tmp/os1.pub
-RUN echo "${OS_PUBLIC_KEY2}" > /tmp/os2.pub
 RUN make trusted_applet_nosign