Docker: use docker compose (v2) (#194)

The old version was removed in 9932d8a,
but we never updated the commands to use the new version.

The docker compose plugin is already included when installing docker
from the official site. See https://docs.docker.com/compose/install/.

dockerfiles/tasks.py

@@ -8,7 +8,7 @@
 DOCKER_COMPOSE_WEBPACK = 'common/dockerfiles/docker-compose-webpack.yml'
 DOCKER_COMPOSE_ASSETS = 'dockerfiles/docker-compose-assets.yml'
 DOCKER_COMPOSE_OVERRIDE = 'docker-compose.override.yml'
-DOCKER_COMPOSE_COMMAND = f'docker-compose --project-directory=. -f {DOCKER_COMPOSE} -f {DOCKER_COMPOSE_OVERRIDE} -f {DOCKER_COMPOSE_SEARCH} -f {DOCKER_COMPOSE_WEBPACK}'
+DOCKER_COMPOSE_COMMAND = f'docker compose --project-directory=. -f {DOCKER_COMPOSE} -f {DOCKER_COMPOSE_OVERRIDE} -f {DOCKER_COMPOSE_SEARCH} -f {DOCKER_COMPOSE_WEBPACK}'
 
 @task(help={
     'cache': 'Build Docker image using cache (default: False)',
@@ -19,10 +19,10 @@ def build(c, cache=False):
     c.run(f'{DOCKER_COMPOSE_COMMAND} build {cache_opt}', pty=True)
 
 @task(help={
-    'command': 'Command to pass directly to "docker-compose"',
+    'command': 'Command to pass directly to "docker compose"',
 })
 def compose(c, command):
-    """Pass the command to docker-compose directly."""
+    """Pass the command to docker compose directly."""
     c.run(f'{DOCKER_COMPOSE_COMMAND} {command}', pty=True)
 
 @task(help={
@@ -56,7 +56,7 @@ def up(c, search=True, init=False, reload=True, webpack=False, ext_theme=False,
     cmd.append('DOCKER_NO_RELOAD=t' if not reload else 'DOCKER_NO_RELOAD=')
     cmd.append(f'RTD_LOGGING_LEVEL={log_level}')
 
-    cmd.append('docker-compose')
+    cmd.append('docker compose')
     cmd.append('--project-directory=.')
     cmd.append(f'-f {DOCKER_COMPOSE}')
     cmd.append(f'-f {DOCKER_COMPOSE_OVERRIDE}')
@@ -165,7 +165,7 @@ def test(c, arguments='', running=True):
 @task
 def buildassets(c):
     """Build all assets for the application and push them to backend storage"""
-    c.run(f'docker-compose -f {DOCKER_COMPOSE_ASSETS} run --rm assets bash -c "npm ci && node_modules/bower/bin/bower --allow-root update && npm run build"', pty=True)
+    c.run(f'docker compose -f {DOCKER_COMPOSE_ASSETS} run --rm assets bash -c "npm ci && node_modules/bower/bin/bower --allow-root update && npm run build"', pty=True)
     c.run(f'{DOCKER_COMPOSE_COMMAND} run --rm web python3 manage.py collectstatic --noinput', pty=True)