add readme

main.go

@@ -194,7 +194,12 @@ func getPodcastEpisodes(db *sqlx.DB, podcastId int64) ([]*Episode, error) {
 func main() {
 	podcastsDirPath := os.Getenv("PODCASTS_DIRPATH")
 
-	db, err := sqlx.Connect("sqlite3", "./db/sqlite.db")
+	dbPath := os.Getenv("DB_PATH")
+	if dbPath == "" {
+		dbPath = "./db/sqlite.db"
+	}
+
+	db, err := sqlx.Connect("sqlite3", dbPath)
 	if err != nil {
 		log.Fatalf("failed to connect to db: %v\n", err)
 	}

readme.md

@@ -0,0 +1,14 @@
+# podcaster
+
+## usage
+
+```bash
+go run .
+```
+
+## env
+
+```bash
+PODCASTS_DIRPATH=./podcasts # directory with podcasts and episodes
+DB_PATH=./db/sqlite.db # path to sqlite db file
+```