remove volumes from statistics service and move environment variables to compose

Previously, two volumes were bound to the statistics service. Both are removed
here. The first volume was a .env file, whose contents are now moved to the
compose file under the 'environment' keyword. The second, enabling persistent
storage for the /app folder, also caused the crucial 'fetch_and_update.php' to
be overwritten. Persistent storage is not currently necessary within this
service.

src/docker-compose.yml

@@ -21,9 +21,17 @@ services:
     image: registry.gitlab.com/signalytic/client-external/streamline/streamline-emr/statistics/arm64:2.3
     container_name: streamline-emr-statistics
     restart: unless-stopped
-    volumes:
-      - "${STATISTICS_ENV:-./resources/statistics.env}:/app/statistics.env"
-      - "${STATISTICS_DATA_DIR:-./statistics_data}:/app"
+    environment:
+      SERVER: https://impactdashboard.streamlinehealth.tech/
+      SERVER_ENDPOINT: signalytic/receive_data
+      SERVER_STATUS_URL: signalytic/status
+      DB_HOST: streamline-emr
+      DB_DATABASE: streamline
+      DB_USERNAME: root
+      DB_PASSWORD: streamline
+      REDIS_HOST: streamline-emr-redis
+      REDIS_PORT: 6379
+      REDIS_TTL: 432000
     depends_on:
       - streamline-emr
       - redis