Updated Dockerfile (h2non#384)

1. Changed base image to bullseye
2. The updated base image contains an updated version of libjemalloc too, so building from source is no longer necessary
3. Updated libvips version too

Author: ItalyPaleAle

Dockerfile

@@ -1,5 +1,5 @@
 ARG GOLANG_VERSION=1.17
-FROM golang:${GOLANG_VERSION}-buster as builder
+FROM golang:${GOLANG_VERSION}-bullseye as builder
 
 ARG IMAGINARY_VERSION=dev
 ARG LIBVIPS_VERSION=8.12.2
@@ -89,15 +89,6 @@ RUN DEBIAN_FRONTEND=noninteractive \
   rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 ENV LD_PRELOAD=/usr/local/lib/libjemalloc.so
 
-ADD https://github.com/jemalloc/jemalloc/releases/download/5.2.1/jemalloc-5.2.1.tar.bz2 /tmp/jemalloc-5.2.1.tar.bz2
-RUN apt-get update && apt install -y bzip2 gcc make autoconf
-RUN cd /tmp \
-    && tar -jxvf jemalloc-5.2.1.tar.bz2 --no-same-owner \
-    && cd jemalloc-5.2.1 \
-    && ./configure --enable-prof && make && make install \
-    && rm -rf /tmp/*
-ENV LD_PRELOAD=/usr/local/lib/libjemalloc.so
-
 # Server port to listen
 ENV PORT 9000