Add gitlab build script, fix dockerfile and dockerignore

pycar/Dockerfile

@@ -1,10 +1,7 @@
 FROM vato.ddns.net:8083/python:3
 
-ARG PYPI_USERNAME
-ARG PYPI_PASSWORD
-
 RUN apt-get update
-# OpenCV has a LOT of dependencies.
+# OpenCV dependencies.
 RUN apt-get install -y \
     libglib2.0-0 \
     libsm6 \
@@ -19,6 +16,10 @@ RUN apt-get install -y \
     libpq-dev \
     && rm -rf /var/lib/apt/lists/*
 
+
+ARG PYPI_USERNAME
+ARG PYPI_PASSWORD
+
 COPY requirements.txt /
 RUN pip install --index-url https://${PYPI_USERNAME}:${PYPI_PASSWORD}@vato.ddns.net/nexus/repository/pypi-grouped/simple -r requirements.txt
 
@@ -33,4 +34,4 @@ ENV CAR_LIDAR=LIDAR_MOCK
 # EXPOSE 1883
 ENV PYTHONPATH=/app
 
-CMD ["python", "-m", "car"]
+ENTRYPOINT ["python", "-m", "car"]