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diff --git a/docker/docker-compose.api.yml b/docker/docker-compose.api.yml
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+### CRIMSON --- A simple PHP framework.
+### Copyright © 2024 Freya Murphy <contact@freyacat.org>
+###
+### This file is part of CRIMSON.
+###
+### CRIMSON is free software; you can redistribute it and/or modify it
+### under the terms of the GNU General Public License as published by
+### the Free Software Foundation; either version 3 of the License, or (at
+### your option) any later version.
+###
+### CRIMSON is distributed in the hope that it will be useful, but
+### WITHOUT ANY WARRANTY; without even the implied warranty of
+### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+### GNU General Public License for more details.
+###
+### You should have received a copy of the GNU General Public License
+### along with CRIMSON. If not, see <http://www.gnu.org/licenses/>.
+
+services:
+  # `docker-compose-api.yml`
+  # This compose file creates the `rest` container running postgrest. This is
+  # the program that crimson uses for the default API functionality.
+  #
+  # This service stack is only enabled when API_ENABLED=true.
+  #
+  # WARNING: The postgres container must also be enabled `POSTGRES_ENABLED=true`
+  # otherwise the docker stack will be invalid.
+
+  rest:
+    # Postgrest uses postgres to store the api schema. To work properly, the
+    # database must be working (healthy) and all the api schema must be loaded.
+    # It is db-init's job to load the api schema, thus this container depends
+    # on both postgres and db-init.
+    build: ../build/postgrest
+    restart: unless-stopped
+    environment:
+      - API_SECRET
+      - API_ROLE
+      - API_SCHEMA
+      - POSTGRES_DB
+      - POSTGRES_USER
+      - POSTGRES_PASSWORD
+    healthcheck:
+      test: curl -I "http://localhost:3000/"
+      interval: 10s
+      timeout: 3s
+      retries: 10
+      start_period: 3s
+    depends_on:
+      postgres:
+        condition: service_healthy
+      db-init:
+        condition: service_completed_successfully
+
+  web:
+    # Nginx proxies requests to the API making it an added dependency.
+    depends_on:
+      rest:
+        condition: service_healthy
+