add optional variables in .env.dist; remove *.db from .gitignore; add build command in docker-compose.yml

.env.dist

@@ -1 +1,8 @@
 RSSBOT_TG_TOKEN=1234567890:yourbotstoken
+
+# Optional variables
+# RSSBOT_DSN=xxx
+# POSTGRES_USER=xxx
+# POSTGRES_PASSWORD=xxx
+# POSTGRES_DB=xxx
+# LOG_LEVEL=xxx

.gitignore

@@ -5,8 +5,5 @@
 /.venv
 /__pycache__
 
-# Database
-/*.db
-
 # Environment
 .env

docker-compose.yml

@@ -2,6 +2,7 @@ version: '3.7'
 
 services:
   app:
+    build: .
     image: miroslavsckaya/tg_rss_bot
     environment:
       # DSN schema: postgres://username:password@hostname/database_name
@@ -24,8 +25,8 @@ services:
       - "POSTGRES_PASSWORD=${BOT_DB_PASSWORD:-dev}"
       - "POSTGRES_DB=${BOT_DB_NAME:-bot}"
     volumes:
-      - postgres_bot_db:/var/lib/postgresql/data
+      - db-data:/var/lib/postgresql/data
     restart: unless-stopped
   
 volumes:
-  postgres_bot_db:
+  db-data: