Refactor Makefile to use variable for docker compose command and add docker-compose.yml for spanner services

Makefile

@@ -1,22 +1,24 @@
 .PHONY: up down down-volume logs ps
 
+COMPOSE = docker compose -f docker/docker-compose.yml
+
 up:
-	docker compose up -d spanner
+	$(COMPOSE) up -d spanner
 
 init:
-	docker compose up -d spanner-init
+	$(COMPOSE) up -d spanner-init
 
 down:
-	docker compose down
+	$(COMPOSE) down
 
 down-volume:
-	docker compose down -v
+	$(COMPOSE) down -v
 
 ps:
-	docker compose ps
+	$(COMPOSE) ps
 
 logs:
-	docker compose logs -f
+	$(COMPOSE) logs -f
 
 server:
 	go -C api run ./cmd/server

docker/docker-compose.yml

@@ -12,12 +12,12 @@ services:
     depends_on:
       - spanner
     env_file:
-      - .env
+      - ../.env
     environment:
       # Tell gcloud/client libs to talk to the emulator inside the network
       - SPANNER_EMULATOR_HOST=spanner:9010
     volumes:
-      - ./scripts/spanner-init.sh:/work/spanner-init.sh:ro
-      - ./ddl:/work/ddl:ro
+      - ../scripts/spanner-init.sh:/work/spanner-init.sh:ro
+      - ../ddl:/work/ddl:ro
     working_dir: /work
     entrypoint: [ "bash", "/work/spanner-init.sh" ]