Revert "Refactor Gitea production deployment process to utilize SSH for remote operations"

This reverts commit 99bc36439e.

compose.production.yaml

@@ -13,7 +13,10 @@ x-container-logging: &container-logging
     max-file: "5"
 
 x-backend: &backend
-  image: ${IMAGE_PREFIX:?Set the Gitea registry/owner/image prefix}-backend:${DEPLOY_TAG:?Set the published release tag}
+  image: wq-alpha-production-backend:${DEPLOY_TAG:-local}
+  build:
+    context: .
+    dockerfile: Dockerfile.backend
   environment:
     DATABASE_URL: ${DATABASE_URL:?Set the Gitea DATABASE_URL secret}
     ADMIN_USERNAME: ${ADMIN_USERNAME:-admin}
@@ -29,6 +32,9 @@ x-backend: &backend
     AI_OUTPUT_TOKENS: ${AI_OUTPUT_TOKENS:-4096}
     AI_TIMEOUT: ${AI_TIMEOUT:-180}
     WQ_BASE_URL: ${WQ_BASE_URL:-https://api.worldquantbrain.com}
+  networks:
+    - default
+    - database
 
 services:
   backend:
@@ -61,7 +67,10 @@ services:
       <<: *observability-labels
       observability.service: "web"
     logging: *container-logging
-    image: ${IMAGE_PREFIX:?Set the Gitea registry/owner/image prefix}-web:${DEPLOY_TAG:?Set the published release tag}
+    image: wq-alpha-production-web:${DEPLOY_TAG:-local}
+    build:
+      context: .
+      dockerfile: Dockerfile.frontend
     environment:
       SITE_ADDRESS: http://:80
     ports:
@@ -80,6 +89,10 @@ services:
       start_period: 10s
     restart: unless-stopped
 
+networks:
+  database:
+    external: true
+    name: ${DATABASE_NETWORK:?Set the existing PostgreSQL Docker network}
 volumes:
   caddy_data:
   caddy_config: