init commit

.env.example

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+# === Telegram ===
+BOT_TOKEN=123456789:ABCDEF_your_token_here
+
+# === Database (choose) ===
+# Preferred single URL:
+#DATABASE_URL=postgresql+psycopg://postgres:postgres@db:5432/tg_poster
+
+# Or compose parts:
+DB_HOST=db
+DB_PORT=5432
+DB_NAME=tg_poster
+DB_USER=postgres
+DB_PASSWORD=postgres
+
+# Logging level: DEBUG, INFO, WARNING, ERROR
+LOG_LEVEL=INFO