feat: configure the game from env variables

docker/compose.yml

@@ -43,6 +43,15 @@ services:
           size: 1g
       - planets:/opt/lwb5/site/static/beta5/pics/pl:ro
       - pgen:/var/spool/pgen:rw
+    environment:
+      LW_DB_HOST: db
+      LW_DB_ADMIN_PASS_FILE: /run/secrets/lw_db_admin_pass
+      LW_DB_USER_PASS_FILE: /run/secrets/lw_db_user_pass
+      LW_SEND_MAIL: ${LW_SEND_MAIL}
+      LW_STATIC_URL: ${LW_STATIC_URL}
+    secrets:
+      - lw_db_user_pass
+      - lw_db_admin_pass
 
   planetgen:
     build:

docker/env.example

@@ -1,6 +1,11 @@
 # Password for the database superuser
 DB_PASSWORD=...
 
+# URL of the static assets from an external perspective
+LW_STATIC_URL=http://localhost/static
+# Send email? (yes or no)
+LW_SEND_MAIL=no
+
 # Legacyworlds database - Main user
 LW_DB_USER_PASS=...
 # Legacyworlds database - Admin user