Docker image improvement

tools/docker/Dockerfile

@@ -1,11 +1,29 @@
-FROM ubuntu:19.10
+FROM ubuntu:20.04
 
 # Arguments that can be overridden in 'docker build' command:
-# Versions of Android SDK, NDK and CMake
+# Versions of Android SDK and NDK. The CMake is installed via NDK.
 ARG VERSION_SDK=6200805
 ARG VERSION_NDK=21.0.6113669
 ARG VERSION_CMAKE=3.10.2.4988404
 
+# Packages to install via apt-get
+ARG VERSION_PYTHON3=3.8.2-0ubuntu2
+ARG VERSION_PYTHON3_PIP=20.0.2-5ubuntu1
+ARG VERSION_PYTHON3_SETUPTOOLS=45.2.0-1
+ARG VERSION_PYTHON3_WHEEL=0.34.2-1
+ARG VERSION_NINJA_BUILD=1.10.0-1build1
+ARG VERSION_BUILD_ESSENTIAL=12.8ubuntu1
+ARG VERSION_OPENJDK_8_JDK_HEADLESS=8u252-b09-1ubuntu1
+ARG VERSION_CURL=7.68.0-1ubuntu2
+ARG VERSION_UNZIP=6.0-25ubuntu1
+ARG VERSION_BASH=5.0-6ubuntu1
+ARG VERSION_NASM=2.14.02-1
+ARG VERSION_PKG_CONFIG=0.29.1-0ubuntu4
+ARG VERSION_MAKE=4.2.1-1.2
+
+# Package to install via pip3
+ARG VERSION_MESON=0.53.2
+
 # The HOME variable isn't available for ENV directive (during building an image).
 # So we define one manually. For alpine and ubuntu it should be '/root'
 ARG HOME_TWIN=/root
@@ -15,18 +33,25 @@ ENV ANDROID_SDK_HOME=${HOME_TWIN}/android-sdk
 ENV ANDROID_NDK_HOME=${ANDROID_SDK_HOME}/ndk/${VERSION_NDK}
 
 # Installing basic software
-RUN apt-get update && apt-get install -y \
-  python3 python3-pip python3-setuptools python3-wheel ninja-build \
-  openjdk-8-jdk-headless \
-  curl \
-  unzip \
-  bash \
-  nasm \
-  pkg-config \
-  make
+RUN apt-get update && apt-get install -y --no-install-recommends \
+  python3=$VERSION_PYTHON3 \
+  python3-pip=$VERSION_PYTHON3_PIP \
+  python3-setuptools=$VERSION_PYTHON3_SETUPTOOLS \
+  python3-wheel=$VERSION_PYTHON3_WHEEL \
+  ninja-build=$VERSION_NINJA_BUILD \
+  build-essential=$VERSION_BUILD_ESSENTIAL \
+  openjdk-8-jdk-headless=$VERSION_OPENJDK_8_JDK_HEADLESS \
+  curl=$VERSION_CURL \
+  unzip=$VERSION_UNZIP \
+  bash=$VERSION_BASH \
+  nasm=$VERSION_NASM \
+  pkg-config=$VERSION_PKG_CONFIG \
+  make=$VERSION_MAKE \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
 
 # Meson has to be installed in a different way
-RUN pip3 install meson==0.53.2
+RUN pip3 install meson==$VERSION_MESON
 
 # Download the Android SDK
 RUN curl https://dl.google.com/android/repository/commandlinetools-linux-${VERSION_SDK}_latest.zip --output ${HOME_TWIN}/android-sdk.zip
@@ -36,7 +61,7 @@ RUN mkdir -p ${HOME_TWIN}/android-sdk && \
   rm ${HOME_TWIN}/android-sdk.zip
 
 # Installing components through the Android SDK
-RUN installAndroidComponent() { yes | ${ANDROID_SDK_HOME}/tools/bin/sdkmanager --sdk_root=${ANDROID_SDK_HOME} $1 > /dev/null; } && \
+RUN installAndroidComponent() { yes | ${ANDROID_SDK_HOME}/tools/bin/sdkmanager --sdk_root=${ANDROID_SDK_HOME} "$1" > /dev/null; } && \
   installAndroidComponent "ndk;${VERSION_NDK}" && \
   installAndroidComponent "cmake;${VERSION_CMAKE}"