Add docker-compose merge file for production build (#1822)

* Add docker-compose merge file for production build

This will allow the default docker-compose.yml file to build the
development build, but allow passing an extra `-f` flag to docker
compose in order to build the production build instead.

* Remove redundant build-arg parameter in CI

The docker-compose.production.yml file already defines the ENVIRONMENT
build arg (and env var) everywhere required, so the command-line arg to
docker compose is now redundant.

.github/workflows/integrate-and-deploy.yml

@@ -62,13 +62,9 @@ jobs:
           cache: 'pnpm'
       -
         run: pnpm install
-      -
-        name: Prep for production build of legacy app
-        # docker compose build doesn't allow passing a `--target` parameter, so we have to replace the target in docker-compose.yml
-        run: "sed -i 's/target: development/target: production/g' docker-compose.yml"
       -
         name: Build legacy app
-        run: docker compose build --build-arg ENVIRONMENT=production --build-arg BUILD_VERSION=${{ steps.image.outputs.TAG_APP }} app
+        run: docker compose -f docker-compose.yml -f docker-compose.production.yml build --build-arg BUILD_VERSION=${{ steps.image.outputs.TAG_APP }} app
       -
         name: Verify version stamping
         run: |

docker-compose.production.yml

@@ -0,0 +1,27 @@
+services:
+
+  app:
+    build:
+      target: production
+      args:
+        - ENVIRONMENT=production
+    environment:
+      - ENVIRONMENT=production
+
+  lfmerge:
+    build:
+      args:
+        - ENVIRONMENT=production
+    environment:
+      - ENVIRONMENT=production
+
+  e2e-app:
+    build:
+      args:
+        - ENVIRONMENT=production
+    environment:
+      - ENVIRONMENT=production
+
+  test-php:
+    environment:
+      - ENVIRONMENT=production