Add readme with commands, ...

README.md

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+Basic commands for web development
+==================================
+
+After you clone this repository, run `make`. It will download, locally install
+and setup virtualenv and pip, and then locally install all required packages
+from `requirements.txt`.
+
+When working with the code, always use the binaries in `./bin/`, such as
+`bin/pip`, `bin/python`, ... never the global python, pip, ...
+Use `make` and `./manage.py` for most things.
+
+Use git.
+
+
+Make commands
+-------------
+
+* `make install` (or `make`) - locally install and setup virtualpy, install
+  required packages. Ran again installs missing packages. Run after changing
+  `requirements.txt`.
+
+* `make clean` - remove local python packages.
+
+* `make veryclean` - remove local packages and virtualpy enviroment and
+  binaries.
+
+* `make run` - runs "./manage.py runserver_plus"
+
+* `make push_test` - pushes the last commited version to test location.
+  Only git-commited changes are pushed! Rest is re-generated from scratch.
+  At test server, the media data and database are kept the same.
+  Everything else not in .gitignore is deleted/overwritten on the test server.
+
+./manage.py commands
+--------------------
+
+* `./manage.py migrate` - update the database schema, initialise the database.
+  You need to run this in the beginning.
+
+* `./manage.py runserver_plus` - run a debugging server for the web. Slightly
+  enhanced compared to `./manage.py runserver`.
+  Open [127.0.0.1:8000](127.0.0.1:8000).
+
+* `./manage.py test` - run the tests.
+
+
+Configurations
+--------------
+
+* `mamweb/settings_common.py` contains most configuration options.
+* `mamweb/settings.py` is used only for local development.
+* `mamweb/settings_test.py` is used for testing on atrey.
+* `mamweb/settings_prod.py` is used in production deployment.
+
+These are automatically switched by `make`.
+
+