Install Qt 5.9.4 LTS

Dockerfile

@@ -46,6 +46,11 @@ RUN git clone https://github.com/pyenv/pyenv.git /builder/.pyenv && \
     PYTHON_CONFIGURE_OPTS="--enable-shared" pyenv install --force 3.5.5 && \
     PYTHON_CONFIGURE_OPTS="--enable-shared" pyenv install --force 3.6.4
 
+USER root
+RUN curl https://download.qt.io/official_releases/qt/5.9/5.9.4/qt-opensource-linux-x64-5.9.4.run --output qt-opensource-linux-x64-5.9.4.run && \
+    chmod +x qt-opensource-linux-x64-5.9.4.run && \
+    ./qt-opensource-linux-x64-5.9.4.run --script ./qt-installer-noninteractive.qs
+    
 # Entry point
 USER root
 COPY bootstrap.sh /root/bootstrap.sh