build: Improve dev setup

extra/Dockerfile

@@ -26,6 +26,6 @@ ENV ACTIVEADMIN_VERSION=$ACTIVEADMIN_VERSION
 WORKDIR /app
 COPY . /app
 RUN bundle install
-RUN mkdir -p /app/spec/dummy/db && chown -R app:app /app/spec/dummy/db /usr/local/bundle
+RUN chown -R app:app /usr/local/bundle
 
 RUN ln -s /app/extra/.bashrc /home/app/.bashrc

extra/dev_setup.sh

@@ -4,5 +4,3 @@ export DEVEL=1
 
 export RAILS_VERSION=7.2.2.1
 export ACTIVEADMIN_VERSION=3.3.0
-
-export RAILS_ENV=development

extra/development.md

@@ -1,29 +1,21 @@
 ## Development
 
-Overcommit can be used to ensure that Conventional commits are good.
-
 ### Dev setup
 
-There 2 ways to interact with this project:
+There are 2 ways to interact with this project:
 
 1) Using Docker:
 
 ```sh
-# Run rails server on the dummy app (=> http://localhost:3000 to access to ActiveAdmin):
-make up
-# Enter in a Rails console (with the dummy app started):
-make console
-# Enter in a shell (with the dummy app started):
-make shell
-# Run the linter on the project (with the dummy app started):
-make lint
-# Run the test suite (with the dummy app started):
-make specs
-# Remove container and image:
-make cleanup
-# To try different versions of Ruby/Rails/ActiveAdmin:
-RUBY=3.2 RAILS=7.1.0 ACTIVEADMIN=3.2.0 make up
-# For more commands please check the Makefile
+make up         # starts the dev services (optional env vars: RUBY / RAILS / ACTIVEADMIN)
+make specs      # run the tests (after up)
+make lint       # run the linters (after up)
+make server     # run the server (after up)
+make shell      # open a shell (after up)
+make down       # cleanup (after up)
+
+# Example using specific versions:
+RUBY=3.2 RAILS=7.1 ACTIVEADMIN=3.2.0 make up
 ```
 
 2) With a local setup:

extra/docker-compose.yml

@@ -4,10 +4,10 @@ services:
       context: ..
       dockerfile: extra/Dockerfile
       args:
-        ACTIVEADMIN_VERSION: ${ACTIVEADMIN:-}
         BUNDLER_VERSION: ${BUNDLER_VERSION}
-        RAILS_VERSION: ${RAILS:-}
         RUBY_IMAGE: ruby:${RUBY:-3.4}-slim
+        RAILS_VERSION: ${RAILS:-}
+        ACTIVEADMIN_VERSION: ${ACTIVEADMIN:-}
         UID: ${UID}
     user: ${UID}:${GID}
     ports: