Update Dockerfile and readme

Dockerfile

@@ -1,19 +1,19 @@
 FROM nimlang/nim:alpine as nim
 MAINTAINER setenforce@protonmail.com
 EXPOSE 8080
-ARG HOSTNAME
-ENV HOSTNAME ${HOSTNAME:-nitter.net}
 
 COPY . /src/nitter
 WORKDIR /src/nitter
 
 RUN apk update \
     && apk add libsass-dev libffi-dev openssl-dev \
-    && nimble build -y -d:release -d:hostname=${HOSTNAME} \
+    && nimble build -y -d:release --passC:"-flto" --passL:"-flto" \
+    && strip -s nitter \
     && nimble scss
 
 FROM alpine
 WORKDIR /src/
-COPY --from=nim /src/nitter .
-RUN apk add pcre-dev sqlite-dev
+RUN apk --no-cache add pcre-dev sqlite-dev
+COPY --from=nim /src/nitter/nitter /src/nitter/nitter.conf ./
+COPY --from=nim /src/nitter/public ./public
 CMD ./nitter