Update Dockerfile to use static-web-server

dockerfile

@@ -6,15 +6,13 @@ ENV SITE_DIR=/app/site
 RUN mkdocs build -d $SITE_DIR
 
 
-FROM caddy:alpine
-USER root
-RUN apk add --no-cache libcap && \
-    setcap -r /usr/bin/caddy && \
-    chmod +x /usr/bin/caddy
+FROM joseluisq/static-web-server:2.40
+ENV SERVER_PORT=8080
+ENV SERVER_HOST=0.0.0.0
+ENV SERVER_ROOT=/public
+ENV SERVER_LOG_LEVEL=info
 
-
-COPY --from=builder /app/site /srv
-
-USER 1000
+COPY --from=builder /app/site /public
+RUN chmod -R 0444 /public
+USER 65432
 EXPOSE 8080
-CMD ["caddy", "file-server", "--listen", ":8080"]