Fix travis to use docker build

Author: Belval

.travis.yml

@@ -1,11 +1,12 @@
 language: python
 python:
   - "3.6"
+services:
+  - docker
+before_install:
+  - docker build -t trdg .
 install:
-  - pip install -r requirements-hw.txt
   - pip install codecov
-  - python3 setup.py install
 script:
-  - python3 tests.py
-  - coverage run tests.py
+  - docker run -v $(pwd):/app/ -t trdg:latest coverage run tests.py
   - codecov

Dockerfile

@@ -1,5 +1,5 @@
 # We use Ubuntu as base image
-FROM ubuntu:18.04
+FROM ubuntu
 
 WORKDIR /app
 
@@ -24,11 +24,11 @@ RUN apt-get update \
 # Set the locale
 RUN sed -i -e 's/# en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen && \
     locale-gen
-ENV LANG en_US.UTF-8  
-ENV LANGUAGE en_US:en  
-ENV LC_ALL en_US.UTF-8  
+ENV LANG en_US.UTF-8
+ENV LANGUAGE en_US:en
+ENV LC_ALL en_US.UTF-8
 
-COPY . /app
+COPY . /app/
 
 RUN git clone https://github.com/python-pillow/Pillow.git \
  && cd Pillow \
@@ -37,4 +37,5 @@ RUN git clone https://github.com/python-pillow/Pillow.git \
 
 RUN python3 setup.py install
 RUN pip3 install -r requirements-hw.txt
+RUN pip3 install codecov