Update Dockerfile.ubuntu

.github/ciimage/Dockerfile.ubuntu

@@ -0,0 +1,30 @@
+# Use an appropriate base image
+FROM ubuntu:bionic
+
+# Set environment variables
+ENV DEBIAN_FRONTEND noninteractive
+ENV LANG='C.UTF-8'
+
+# Update packages and install system dependencies
+RUN apt-get update --fix-missing && apt-get upgrade -y && \
+    apt-get -y install \
+        git-all \
+        libc6-dev \
+        gcc \
+        g++
+
+# Install Python 3 and pip
+RUN apt-get -y install python3 python3-pip python3-wheel python3-setuptools
+
+# Upgrade pip
+RUN pip3 -q install --upgrade pip
+
+# Install Python dependencies
+RUN pip3 install \
+    meson==1.4.0 \
+    cmake==3.16.3 \
+    ninja==1.9.0 \
+    pytest==5.3.2 \
+    pytest-cov==2.8.1 \
+    codecov==2.0.15 \
+    PyQt5==5.14.1