Remove development packages from Pulsar's docker images (#14093)

* Remove development packages from Pulsar's docker images

* Add "--no-install-recommends" to skip installing GCC and lots of other tools

* Install ca-certificates

* Install build-essential for building pulsar-functions-go examples

docker/pulsar/Dockerfile

@@ -47,18 +47,14 @@ ARG UBUNTU_MIRROR=mirror://mirrors.ubuntu.com/mirrors.txt
 RUN sed -i "s|http://archive\.ubuntu\.com/ubuntu/|${UBUNTU_MIRROR:-mirror://mirrors.ubuntu.com/mirrors.txt}|g" /etc/apt/sources.list \
      && apt-get update \
      && apt-get -y dist-upgrade \
-     && apt-get -y install openjdk-11-jdk-headless netcat dnsutils less procps iputils-ping \
-                 python3 python3-dev python3-setuptools python3-yaml python3-kazoo \
-                 libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev \
-                 curl \
+     && apt-get -y install --no-install-recommends openjdk-11-jdk-headless netcat dnsutils less procps iputils-ping \
+                 python3 python3-yaml python3-kazoo python3-pip \
+                 curl ca-certificates \
      && apt-get -y --purge autoremove \
      && apt-get autoclean \
      && apt-get clean \
      && rm -rf /var/lib/apt/lists/*
 
-RUN curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
-RUN python3 get-pip.py
-
 RUN update-alternatives --install /usr/bin/python python /usr/bin/python3 10
 
 ENV JAVA_HOME /usr/lib/jvm/java-11-openjdk-amd64

tests/docker-images/latest-version-image/Dockerfile

@@ -24,7 +24,7 @@ FROM apachepulsar/pulsar:latest as pulsar-function-go
 USER root
 
 RUN rm -rf /var/lib/apt/lists/* && apt-get update
-RUN apt-get install -y procps curl git
+RUN apt-get install -y procps curl git build-essential
 
 ENV GOLANG_VERSION 1.13.3