feat(docker): reduced Dockerfile and added .drone.yml to dockerignore

.dockerignore

@@ -1,4 +1,5 @@
 *.pyc
 .git/
 Dockerfile
-__pycache__/*
+__pycache__/*
+drone.yml

Dockerfile

@@ -1,13 +1,9 @@
 FROM python:3.9-alpine
 
-COPY requirements.txt /
+COPY . /
 
 RUN pip3 install -r /requirements.txt
 
-COPY ./app/ /app
-
-WORKDIR /app
-
 EXPOSE 80/tcp
 
 ENTRYPOINT ["./entrypoint.sh"]