docker-compose: add a build.sh script which automates the setup

* Create the user in the image with the same UID than the host user.
  This makes it easier to share files between the host and the container.
* Install the PHP dependencies right away, so the user doesn't have to
  know anything about composer at the beginning.

docker-compose/README.md

@@ -6,6 +6,8 @@ the symfony app.
 ## Setup
 
 * `sudo apt install docker-compose` to install docker-compose on Debian/Ubuntu
+* `sudo ./build.sh` - to build the docker images and install the PHP dependencies
+* `sudo docker-compose up` - to run the server: http://127.0.0.1:8000
 
 ## Running the Server
 
@@ -17,7 +19,7 @@ the symfony app.
 
 ## Executing Symfony commands
 
-* `./run` to start a shell in the php-fpm container.
+* `./run.sh` to start a shell in the php-fpm container.
 * After this you can run symfony/composer commands like:
   * `./bin/console debug:config`
   * `composer install`

docker-compose/build.sh

+#!/bin/bash
+
+# We need to creat the user inside the container with the same ID as the host user
+docker-compose build --build-arg "UID=${SUDO_UID:-$UID}"
+
+# Install dependencies
+docker-compose run --rm --entrypoint composer php-fpm install
\ No newline at end of file

docker-compose/php-fpm/Dockerfile

@@ -38,7 +38,8 @@ RUN wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
 
 STOPSIGNAL SIGQUIT
 
-RUN useradd -u 1000 -ms /bin/bash user
+ARG UID
+RUN useradd -u "$UID" -ms /bin/bash user
 RUN echo 'user ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers
 USER user
 

docker-compose/run → docker-compose/run.sh

-#!/bin/sh
+#!/bin/bash
 
 docker-compose run --rm --entrypoint bash php-fpm