Added opt-in ghost service to docker compose (#21938)

ref
https://linear.app/ghost/issue/ENG-1957/add-ghost-service-to-base-docker-compose-setup

- Currently our `compose.yml` file only runs Ghost's supporting
services, and it's expected that you'll run Ghost locally on your host
machine. This commit adds a `ghost` service to our `compose.yml` file,
so you can optionally run Ghost itself in a container using docker
compose.
- The `ghost` service is opt-in using [docker compose
profiles](https://docs.docker.com/compose/how-tos/profiles/), to
maintain the current behavior of only running supporting services as the
default.
- This commit also fixes an issue in the Dockerfile: the `WORKDIR` arg,
which is used to optionally specify an alternative working directory, is
not propagated from one build stage to the next, so it has to be
manually added as an `ARG` in each stage. This was necessary to use the
same Dockerfile for devcontainers (which require the WORKDIR to be
`/workspaces/ghost`) and docker compose, where we use `/home/ghost` in
alignment with the production image.

.docker/Dockerfile

@@ -15,6 +15,7 @@ RUN apt-get update && \
 # Base DevContainer: for use in a Dev Container where your local code is mounted into the container
 ### Adding code and installing dependencies gets overridden by your local code/dependencies, so this is done in onCreateCommand
 FROM base AS base-devcontainer
+ARG WORKDIR=/home/ghost
 # Install Stripe CLI, zsh, playwright
 RUN curl -s https://packages.stripe.dev/api/security/keypair/stripe-cli-gpg/public | gpg --dearmor | tee /usr/share/keyrings/stripe.gpg && \
     echo "deb [signed-by=/usr/share/keyrings/stripe.gpg] https://packages.stripe.dev/stripe-cli-debian-local stable main" | tee -a /etc/apt/sources.list.d/stripe.list && \
@@ -28,7 +29,7 @@ RUN curl -s https://packages.stripe.dev/api/security/keypair/stripe-cli-gpg/publ
     npx -y [email protected] install --with-deps
 
 ENV NX_DAEMON=true
-ENV YARN_CACHE_FOLDER=/workspaces/ghost/.yarncache
+ENV YARN_CACHE_FOLDER=$WORKDIR/.yarncache
 
 EXPOSE 2368
 EXPOSE 4200
@@ -47,21 +48,13 @@ 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
+ARG WORKDIR=/home/ghost
 WORKDIR $WORKDIR
-COPY ../../ .
+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
-
+ARG WORKDIR=/home/ghost
 WORKDIR $WORKDIR
-
-COPY ../../ .
-
-RUN yarn install --frozen-lockfile --prefer-offline --cache-folder $YARN_CACHE_FOLDER && \
-    cp -r .yarncache .yarncachecopy && \
-    rm -Rf .yarncachecopy/.tmp && \
-    yarn cache clean
-
-ENTRYPOINT ["./.devcontainer/.docker/development.entrypoint.sh"]
+ENTRYPOINT ["/home/ghost/.docker/development.entrypoint.sh"]
 CMD ["yarn", "dev"]

.docker/development.entrypoint.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+# Mounting local code into the container overwrites the `node_modules` directories
+# so we need to install dependencies again
+yarn install --frozen-lockfile --prefer-offline
+
+# Execute the CMD
+exec "$@"

compose.yml

@@ -1,6 +1,21 @@
 name: ghost
 
 services:
+  ghost:
+    build:
+      context: .
+      dockerfile: ./.docker/Dockerfile
+      target: development
+    ports:
+      - "2368:2368"
+      - "4200:4200"
+    profiles: [full]
+    volumes:
+      - .:/home/ghost
+    tty: true
+    depends_on:
+      - mysql
+      - redis
   mysql:
     image: mysql:8.0.35
     container_name: ghost-mysql