simplify: Use both image and build directives in compose.yml

Both directives work together:
- 'docker compose up' pulls pre-built image (fast deployment)
- 'docker compose build' builds locally (for customization)

This is the standard Docker Compose pattern - much simpler than
commenting/uncommenting directives.

Author: CybotTM

.github/workflows/docker-build.yml

@@ -174,14 +174,6 @@ jobs:
           sed -i 's/CHANGE_ME_SECURE_ROOT_PASSWORD_HERE/test_root_456/g' .env
           sed -i 's/CHANGE_ME_SECURE_VALKEY_PASSWORD_HERE/test_valkey_789/g' .env
 
-      - name: Configure for local build
-        run: |
-          # Use local build instead of pulling from GHCR for testing
-          sed -i 's|image: ghcr.io/netresearch/moodle-docker/moodle:latest|# image: ghcr.io/netresearch/moodle-docker/moodle:latest|' compose.yml
-          sed -i 's|# build:|build:|' compose.yml
-          sed -i 's|#   context: ./docker/moodle|  context: ./docker/moodle|' compose.yml
-          sed -i 's|#   dockerfile: Dockerfile|  dockerfile: Dockerfile|' compose.yml
-
       - name: Build and start services
         run: |
           docker compose build --no-cache

README.md

@@ -56,22 +56,9 @@ Available tags:
 - `main` - Latest build from main branch
 - `main-<sha>` - Specific commit from main branch
 
-### Building Locally
-
-To build the Moodle image locally (for customization or offline use):
-
-```bash
-# Edit compose.yml and uncomment the build section:
-services:
-  moodle:
-    # image: ghcr.io/netresearch/moodle-docker/moodle:latest
-    build:
-      context: ./docker/moodle
-      dockerfile: Dockerfile
-
-# Then build
-docker compose build
-```
+The `compose.yml` includes both `image:` and `build:` directives:
+- `docker compose up` - Pulls pre-built image (fast)
+- `docker compose build` - Builds locally (for customization)
 
 ## Prerequisites
 

compose.yml

@@ -7,10 +7,9 @@ services:
   # Moodle Application (PHP 8.3 + Apache)
   moodle:
     image: ghcr.io/netresearch/moodle-docker/moodle:latest
-    # Uncomment to build locally instead of using pre-built image:
-    # build:
-    #   context: ./docker/moodle
-    #   dockerfile: Dockerfile
+    build:
+      context: ./docker/moodle
+      dockerfile: Dockerfile
     container_name: ${COMPOSE_PROJECT_NAME:-moodle45}_moodle
     restart: unless-stopped
     networks: