switch docker to ubuntu 20.04, fix tzdata install

tests/docker/Dockerfile

diff --git a/tests/docker/Dockerfile b/tests/docker/Dockerfile
index 916a3cb..a9fd83f 100644
--- a/tests/docker/Dockerfile
+++ b/tests/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:19.10
+FROM ubuntu:20.04
 
 ADD build.sh /root/build.sh
 RUN apt update && apt install -y dos2unix

tests/docker/build.sh

diff --git a/tests/docker/build.sh b/tests/docker/build.sh
index edc767d..f0e07e6 100644
--- a/tests/docker/build.sh
+++ b/tests/docker/build.sh
@@ -17,7 +17,7 @@
 
 # build env
 apt update
-apt install -y build-essential libjpeg-dev libpng-dev libssl-dev ninja-build cmake pkg-config git perl vim curl python3-pip
+DEBIAN_FRONTEND="noninteractive" apt install -y build-essential libjpeg-dev libpng-dev libssl-dev ninja-build cmake pkg-config git perl vim curl python3-pip
 pip3 install meson
 
 # Rust env

tests/docker/docker-compose.yml

diff --git a/tests/docker/docker-compose.yml b/tests/docker/docker-compose.yml
index 09037cf..b6a8b79 100644
--- a/tests/docker/docker-compose.yml
+++ b/tests/docker/docker-compose.yml
@@ -1,4 +1,4 @@
-version: "3"
+version: "2"
 services:
   libavif:
     build: .