chore: add env_file: stack.env to all compose services

Portainer git-stack deployments require an explicit env_file reference
in the compose file to load variables from the repo's stack.env.
Adds env_file: [stack.env] before every service-level environment:
block across all 10 stacks.

stacks/famapp/docker-compose.yml

@@ -14,6 +14,8 @@ services:
     pull_policy: ${FAMAPP_PULL_POLICY:-always}
     restart: unless-stopped
     networks: [famapp, edge]
+    env_file:
+      - stack.env
     environment:
       NODE_ENV: production
       AUTH_URL: ${AUTH_URL}
@@ -48,6 +50,8 @@ services:
     image: postgres:16-alpine
     restart: unless-stopped
     networks: [famapp]
+    env_file:
+      - stack.env
     environment:
       POSTGRES_USER: ${FAMAPP_DB_USER}
       POSTGRES_PASSWORD: ${FAMAPP_DB_PASSWORD}
@@ -66,6 +70,8 @@ services:
     command: server /data --console-address ":9003"
     restart: unless-stopped
     networks: [famapp]
+    env_file:
+      - stack.env
     environment:
       MINIO_ROOT_USER: ${famapp_MINIO_ROOT_USER}
       MINIO_ROOT_PASSWORD: ${famapp_MINIO_ROOT_PASSWORD}