diff --git a/README.md b/README.md
new file mode 100644
index 0000000..a77115c
--- /dev/null
+++ b/README.md
@@ -0,0 +1,15 @@
+### Environment variables
+
+| Name | Default |
+|:---|:---| 
+| `WS_BUCKET_ADDR` | `0.0.0.0:3020` |
+| `WS_BUCKET_WORKDIR` | `./data` |
+| `WS_BUCKET_LOGLEVEL` | `trace` |
+| `WS_BUCKET_CONNSTR` | `host=localhost user=ws_bucket dbname=ws_bucket password=ws_bucket sslmode=disable` |
+| `WS_BUCKET_DIALECT` | `postgres` |
+
+### Running tests
+```bash
+cd test/
+go test
+```
\ No newline at end of file
diff --git a/main.go b/main.go
index 7d5d74b..ca394ce 100644
--- a/main.go
+++ b/main.go
@@ -3,11 +3,12 @@ package main
 import (
 	"github.com/jinzhu/gorm"
 	"github.com/simon987/ws_bucket/api"
+	"os"
 )
 
 func main() {
 
-	db, err := gorm.Open("postgres", "host=localhost user=ws_bucket dbname=ws_bucket password=ws_bucket sslmode=disable")
+	db, err := gorm.Open(getDialect(), getConnStr())
 	if err != nil {
 		panic(err)
 	}
@@ -15,3 +16,21 @@ func main() {
 	a := api.New(db)
 	a.Run()
 }
+
+func getConnStr() string {
+	connStr := os.Getenv("WS_BUCKET_CONNSTR")
+	if connStr == "" {
+		return "host=localhost user=ws_bucket dbname=ws_bucket password=ws_bucket sslmode=disable"
+	} else {
+		return connStr
+	}
+}
+
+func getDialect() string {
+	connStr := os.Getenv("WS_BUCKET_DIALECT")
+	if connStr == "" {
+		return "postgres"
+	} else {
+		return connStr
+	}
+}