docker: add pyqt5 dependency

Dockerfile

@@ -4,14 +4,27 @@
 #
 
 # Building the Speculos environment
-FROM ghcr.io/ledgerhq/speculos-builder:latest AS builder
+FROM ghcr.io/ledgerhq/speculos-builder:latest AS builder-app
 
 ADD . /speculos
 WORKDIR /speculos/
 
 RUN cmake -Bbuild -H. -DPRECOMPILED_DEPENDENCIES_DIR=/install -DWITH_VNC=1
 RUN make -C build
 
+FROM docker.io/library/python:3.9-slim AS builder-pyqt5
+
+RUN apt-get update && apt-get install -qy --no-install-recommends \
+    qt5-qmake \
+    build-essential \
+    qtbase5-dev
+
+RUN python -m pip install \
+    --no-cache-dir \
+    --config-settings \
+    --confirm-license= \
+    --verbose \
+    pyqt5
 
 # Preparing final image
 FROM docker.io/library/python:3.9-slim
@@ -20,18 +33,20 @@ ADD . /speculos
 WORKDIR /speculos
 
 # Copying artifacts from previous build
-COPY --from=builder /speculos/speculos/resources/ /speculos/speculos/resources/
+COPY --from=builder-app /speculos/speculos/resources/ /speculos/speculos/resources/
+COPY --from=builder-pyqt5 /usr/local/lib/python3.9/site-packages/ /usr/local/lib/python3.9/site-packages/
 
 RUN pip install --upgrade pip pipenv
 RUN pipenv install --deploy --system
 
-
 RUN apt-get update && apt-get install -qy \
     qemu-user-static \
     libvncserver-dev \
     gdb-multiarch \
     binutils-arm-none-eabi \
-    && apt-get clean
+    libqt5widgets5 \
+    libqt5gui5 \
+    libqt5core5a
 
 RUN apt-get clean && rm -rf /var/lib/apt/lists/