linting; some dependencies

.travis.yml

@@ -0,0 +1,7 @@
+language: python
+python:
+  - "3.7"
+  - "3.8"
+install: "pip install -r portier/requirements.txt"
+script:
+  - flake8

portier/Dockerfile

@@ -1 +1,4 @@
-FROM python:3.8
+FROM python:3.8-alpine
+WORKDIR /app
+ADD . /app
+RUN pip install -r requirements.txt

portier/requirements.txt

@@ -0,0 +1,2 @@
+django>=3.0
+celery>=4.4

setup.cfg

@@ -0,0 +1,3 @@
+[flake8]
+exclude = .git,*migrations*
+max-line-length = 120