Consolidated compose.yml files for Dev Container (#21659)

ref
https://linear.app/ghost/issue/ENG-1785/consolidate-dev-container-composeyml-with-the-root-level-composeyml

- We currently have two compose.yml files:
    - `.devcontainer/compose.yml`: used for the Dev Container
    - `compose.yml`: used for local development with docker compose
- The Dev Container compose file does need some additional
configuration, but most of this code is duplicated from the root level
compose.yml file
- This commit removes this duplication by using both compose files in
the Dev Container setup, so it will base the compose configuration on
the root level, and then extend it with the Dev Container specific
configuration
- This way any updates to the root level compose file will also be
available and reflected in the Dev Container setup without having to
make the change twice.

.devcontainer/compose.yml

@@ -11,6 +11,8 @@ services:
       context: ../
       dockerfile: .docker/Dockerfile
       target: base-devcontainer
+      args:
+        WORKDIR: /workspaces/ghost
     pull_policy: never
     environment:
       - DEVCONTAINER=true
@@ -21,30 +23,15 @@ services:
       redis:
         condition: service_healthy
   mysql:
-    image: mysql:8.0.35
-    # We'll need to look into how we can further fine tune the memory usage/performance here
-    command: --innodb-buffer-pool-size=1G --innodb-log-buffer-size=500M --innodb-change-buffer-max-size=50 --innodb-flush-log-at-trx_commit=0 --innodb-flush-method=O_DIRECT
-    ports:
-      - "3306"
-    environment:
-      MYSQL_ROOT_PASSWORD: root
-      MYSQL_DATABASE: ghost
-    restart: always
-    volumes:
-      - mysql-data:/var/lib/mysql
-    healthcheck:
-      test: "mysql -uroot -proot ghost -e 'select 1'"
-      interval: 1s
-      retries: 120
+    extends:
+      file: ../compose.yml
+      service: mysql
+    container_name: ghost-devcontainer-mysql
   redis:
-    image: redis:7.0
-    ports:
-      - "6379"
-    restart: always
-    healthcheck:
-      test: [ "CMD", "redis-cli", "--raw", "incr", "ping" ]
-      interval: 1s
-      retries: 120
+    extends:
+      file: ../compose.yml
+      service: redis
+    container_name: ghost-devcontainer-redis
 
 volumes:
-  mysql-data:
+  mysql-data:

.docker/Dockerfile

@@ -1,4 +1,6 @@
 ARG NODE_VERSION=20.15.1
+ARG WORKDIR=/home/ghost
+
 ## Base Image used for all targets
 FROM node:$NODE_VERSION-bullseye-slim AS base
 RUN apt-get update && \
@@ -45,14 +47,14 @@ EXPOSE 7174
 ### This is a full devcontainer with all the code and dependencies installed
 ### Useful in an environment like Github Codespaces where you don't mount your local code into the container
 FROM base-devcontainer AS full-devcontainer
-WORKDIR /workspaces/ghost
+WORKDIR $WORKDIR
 COPY ../../ .
 RUN yarn install --frozen-lockfile --prefer-offline --cache-folder $YARN_CACHE_FOLDER
 
 # Development Stage: alternative entrypoint for development with some caching optimizations
 FROM base-devcontainer AS development
 
-WORKDIR /workspaces/ghost
+WORKDIR $WORKDIR
 
 COPY ../../ .
 

compose.yml

@@ -26,6 +26,10 @@ services:
     ports:
       - "6379:6379"
     restart: always
+    healthcheck:
+      test: [ "CMD", "redis-cli", "--raw", "incr", "ping" ]
+      interval: 1s
+      retries: 120
   prometheus:
     profiles: [monitoring]
     image: prom/prometheus:v2.30.3