use fluentbit

Dockerfile

@@ -10,31 +10,10 @@ RUN luarocks install lua-cjson \
     && luarocks install lrexlib-pcre2
 
 # https://github.com/fluent/fluent-bit/blob/master/Dockerfile#L60
-FROM ubuntu:latest
+FROM fluent-bit
 
-COPY --from=fluent-bit \
-    /usr/lib/x86_64-linux-gnu/libsasl*.so* \
-    /usr/lib/x86_64-linux-gnu/libssl.so* \
-    /usr/lib/x86_64-linux-gnu/libcrypto.so* \
-    /usr/lib/x86_64-linux-gnu/libyaml*.so* \
-    /usr/lib/x86_64-linux-gnu/
-
-COPY --from=fluent-bit \
-    /usr/lib/x86_64-linux-gnu/libpq.so* \
-    /usr/lib/x86_64-linux-gnu/libgssapi* \
-    /usr/lib/x86_64-linux-gnu/libldap* \
-    /usr/lib/x86_64-linux-gnu/libkrb* \
-    /usr/lib/x86_64-linux-gnu/libk5crypto* \
-    /usr/lib/x86_64-linux-gnu/liblber* \
-    /lib/x86_64-linux-gnu/libkeyutils* \
-    /lib/x86_64-linux-gnu/
-
-COPY --from=fluent-bit /fluent-bit/bin/ /fluent-bit/bin/
 COPY --from=lua-libs /usr/local/lib/lua/ /usr/local/lib/lua/
 COPY *.conf *.lua /fluent-bit/etc/
 
-RUN ldd /fluent-bit/bin/fluent-bit | sort \
-    && /fluent-bit/bin/fluent-bit --version
-
 ENTRYPOINT [ "/fluent-bit/bin/fluent-bit" ]
 CMD [ "-c", "/fluent-bit/etc/fluent-bit.conf" ]