copy public and templates directories into image

Dockerfile

@@ -1,6 +1,8 @@
 FROM scratch
 LABEL maintainer="himself@stevenpolley.net"
 COPY data data
+COPY public public
+COPY templates templates
 COPY ca-certificates.crt /etc/ssl/certs/
 COPY zoneinfo.zip zoneinfo.zip
 COPY ynab-portfolio-monitor .