Pass GPG key ids as separate arguments when exporting.

This makes sure all keys are exported to a keyring archive, as opposed
to only the first key.

Author: thresheek

Dockerfile-debian.template

@@ -29,7 +29,7 @@ RUN set -x \
     done; \
     test -z "$found" && echo >&2 "error: failed to fetch GPG key $NGINX_GPGKEY" && exit 1; \
     done; \
-    gpg1 --export "$NGINX_GPGKEYS" > "$NGINX_GPGKEY_PATH" ; \
+    gpg1 --export $NGINX_GPGKEYS > "$NGINX_GPGKEY_PATH" ; \
     rm -rf "$GNUPGHOME"; \
     apt-get remove --purge --auto-remove -y gnupg1 && rm -rf /var/lib/apt/lists/* \
     && dpkgArch="$(dpkg --print-architecture)" \