Fix docker flow and documentation (#1)

Author: Vidas P

README.md

@@ -466,7 +466,8 @@ Tests can be run with `make test`.
 
 ### Running Locally with Docker
 
-You can test the docker container you just built locally. Run it (with a PostgreSQL database in a separate container):
+You can test ActiveWorkflow using docker locally. Run it (with a PostgreSQL
+database in a separate container):
 
 ```sh
 docker-compose up

docker-compose.yml

@@ -13,7 +13,9 @@ services:
       POSTGRES_USER: active_workflow
 
   active_workflow:
-    image: local/active_workflow
+    build:
+      context: .
+      dockerfile: Dockerfile
     env_file:
       - .env
     environment:

docker/test/Dockerfile

@@ -1,7 +1,10 @@
-FROM local/active_workflow
+FROM ruby:2.6.3-slim
 
 USER 0
 
+COPY docker/scripts/prepare /scripts/
+RUN /scripts/prepare
+
 RUN apt-get update && \
     apt-get -y install \
       build-essential \
@@ -18,13 +21,18 @@ RUN apt-get update && \
       libfontconfig1-dev curl && \
     apt-get -y clean
 
-RUN LC_ALL=en_US.UTF-8 bundle install --with test development --path vendor/bundle -j 4
+WORKDIR /app
+
+COPY ./ /app/
+
+RUN LC_ALL=en_US.UTF-8 umask 002 && bundle install --with test development --path vendor/bundle -j 4
 
-COPY docker/test/scripts/test_env /scripts/
+COPY ["docker/scripts/setup_env", "docker/scripts/init", "docker/test/scripts/test_env", "/scripts/"]
+
+EXPOSE 3000
 
-# Override upstream script with the local one.
-COPY docker/scripts/setup_env /scripts/
 ENTRYPOINT ["/scripts/test_env"]
 CMD ["rake spec"]
 
 USER 1001
+