Add dockerfile and compose for production

docker/production/README.md

@@ -0,0 +1,50 @@
+# Build and deploy Mobilizon with docker
+
+You will need to :
+- build the image
+- adapte env file
+- run docker-compose
+
+## Build the image
+
+    docker build -t mymobilizon -f docker/prod/Dockerfile .
+
+## Adapt env file
+
+    cp env .env
+
+- Edit .env content with your params.
+- Edit docker-compose file with your params (environment section for mobilizon & posgres).
+
+You can generate `MOBILIZON_INSTANCE_SECRET_KEY_BASE` and `MOBILIZON_INSTANCE_SECRET_KEY` with:
+
+    gpg --gen-random --armor 1 50
+
+## run docker-compose
+
+    docker-compose -f docker-compose-simple.yml up
+    # set user for volumes
+    sudo chown 999:999 db public wal public/upload
+    # in another shell
+    docker-compose -f docker-compose-simple.yml exec -u 0 mobilizon bash
+    su - mobilizon
+    # backup secret
+    mv config/prod.secret.exs config/prod.secret.exs.env
+    # run config generation
+    MIX_ENV=prod mix mobilizon.instance gen -f
+    # reply anything (not used after) except for :
+    # - What is the name of your database? [mobilizon_prod]
+    # - What is the user used to connect to your database? [mobilizon] 
+    # - What is the password used to connect to your database? [autogenerated]
+    # get secret env based bak
+    mv config/prod.secret.exs.env config/prod.secret.exs 
+    # run the db init script as root
+    exit
+    psql -U postgres -p 5432 -h postgres -f setup_db.psql
+    # delete db init sript
+    rm setup_db.psql
+    # create an admin with mobilizon user
+    su - mobilizon
+    cd /app
+    MIX_ENV=prod mix mobilizon.users.new pascoual@tedomum.fr --password mobilizon
+    # exit with ctrl+d (twice times)