Add important env variables

OPENAI_API_KEY is necessary for AI tagging, and DISABLE_SIGNUPS is very commonly needed.

templates/compose/hoarder.yaml

@@ -16,6 +16,8 @@ services:
       - NEXTAUTH_URL=${SERVICE_FQDN_HOARDER}
       - MEILI_ADDR=http://meilisearch:7700
       - BROWSER_WEB_URL=http://chrome:9222
+      - OPENAI_API_KEY=${SERVICE_OPENAI_API_KEY}
+      - DISABLE_SIGNUPS=${SERVICE_DISABLE_SIGNUPS}
       - DATA_DIR=/data
 
   chrome:
@@ -41,4 +43,4 @@ services:
       test: ["CMD", "curl", "-f", "http://127.0.0.1:7700/health"]
       interval: 2s
       timeout: 10s
-      retries: 15
+      retries: 15