DB insert/update rows from file, query dates from months

src/main/scala/app/Main.scala

@@ -2,15 +2,27 @@ package app
 
 import cats.effect._
 import cats.implicits.catsSyntaxTuple2Parallel
-import db.{FileService, DataService}
+import db.Main.transactor
+import db.{DataService, FileService, PostgresService}
+import doobie.Transactor
 import fetch.{FetchService, FileFetchScheduler}
 import server.Server
 
 object Main extends IOApp {
+
+  def transactor[F[_] : Async]: Transactor[F] = Transactor.fromDriverManager[F](
+    "org.postgresql.Driver",
+    "jdbc:postgresql://localhost:5432/weather-tool",
+    "postgres",
+    "mysecretpassword"
+  )
   def run(args: List[String]): IO[ExitCode] = {
+    val xa = transactor[IO]
+
     for {
+      postgresService <- PostgresService.of(xa)
       fileService <- FileService.of
-      dataService <- DataService.of(fileService)
+      dataService <- DataService.of(fileService, postgresService)
 
       fetch <- FetchService.of
       fileFetchScheduler <- FileFetchScheduler.of(dataService, fetch)