Prepare for first release

Dockerfile

@@ -1,7 +1,8 @@
-FROM alpine:latest
+FROM alpine:edge
 WORKDIR /app
 
 COPY ./target/x86_64-unknown-linux-musl/release/ /app
 COPY ./about.html /app/about.html
 
+EXPOSE 8080
 CMD [ "./pastabble" ]