add dockerfile and entrypoint script

Dockerfile

@@ -0,0 +1,11 @@
+FROM alpine:latest
+
+RUN apk add --no-cache \
+    brotli \
+    gzip \
+    hugo
+
+COPY entrypoint.sh /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]
+

README.md

@@ -1,2 +1,7 @@
 # Forgejo-Action for building hugo pages
 
+This Action builds a hugo site and runs both gzip and brotli on static text files so a properly configured webbrowser can serve those precompressed files
+
+The compression only works on files in the "public" folder of the actions workdir.
+
+

entrypoint.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+hugo
+find ./public -type f \
+    -regex ".*\.\(css\|html\|js\|json\|svg\|xml\)$" \
+    -exec brotli --best -f {} \+ \
+    -exec gzip --best -k -f {} \+