Update docker image

Dockerfile

@@ -1,11 +1,14 @@
-FROM python:3.6-alpine
+FROM python:3.7-alpine
 
-COPY requirements.txt ./
+WORKDIR /app
 
-RUN pip install -r requirements.txt
+RUN addgroup -S docker && adduser -S user -G docker
+COPY --chown=user:docker src ./src
+COPY --chown=user:docker requirements.txt ./
+USER user
 
-Add /src /app
+RUN pip install -r requirements.txt
 
-WORKDIR /app
+RUN ls -la
 
-CMD ["python", "app.py"]
+CMD ["python", "-m", "src.app"]

src/app.py

@@ -0,0 +1,4 @@
+from src.example import hello
+
+if __name__ == '__main__':
+    print(hello())