diff --git a/README.md b/README.md
index 0cfa516..6114280 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,16 @@
 
 ## Usage
 
+### Using nix
+
+```nix
+nix develop  # to get the dev dependencies
+nix build
+nix run -- /tmp/rss/
+```
+
+### Using podman
+
 Use the `justfile` to run commands:
 
 ```bash
@@ -12,35 +22,7 @@ just init  # Will init the database, and build the app image
 just run   # Will run the lwn-sub-snoozer to update the database and the RSS file
 ```
 
-## Nix setup
-
-For my server, I have the following setup:
-
-```nix
-systemd.timers."rssify-update" = {
-  wantedBy = [ "timers.target" ];
-    timerConfig = {
-      OnBootSec = "5m";
-      OnUnitActiveSec = "12h";
-      Unit = "rssify-update.service";
-    };
-};
-
-systemd.services."rssify-update" = {
-  script = ''
-    ${pkgs.rssify}/bin/echo "Hello World"
-  '';
-  serviceConfig = {
-    Type = "oneshot";
-    User = "root";
-  };
-};
-```
-
 ## TODO
 
-- [ ] Nix service with timer
-- [ ] Better path managment, with env variable in Dockerfile
-- [ ] Clean repo
 - [ ] Add volume to the db to store it if it crashes
 - [ ] Add tests
diff --git a/src/bin/cli.rs b/src/bin/cli.rs
index c1f9519..64c1139 100755
--- a/src/bin/cli.rs
+++ b/src/bin/cli.rs
@@ -13,20 +13,23 @@ fn main() {
     let rt = Runtime::new().unwrap();
 
     let args = Cli::parse();
-    let db_connection_string = &format!(
-        "host={} dbname={} user={} password={}",
-        env::var("POSTGRES_HOST").unwrap_or(String::from("localhost")),
-        env::var("POSTGRES_USER").unwrap_or(String::from("root")),
-        env::var("POSTGRES_USER").unwrap_or(String::from("root")),
-        env::var("POSTGRES_PASSWORD").unwrap_or(String::from("root"))
-    );
+    let db_connection_string = match env::var("DATABASE_CONNECTION") {
+        Ok(s) => s,
+        _ => format!(
+            "host={} dbname={} user={} password={}",
+            env::var("POSTGRES_HOST").unwrap_or(String::from("localhost")),
+            env::var("POSTGRES_USER").unwrap_or(String::from("root")),
+            env::var("POSTGRES_USER").unwrap_or(String::from("root")),
+            env::var("POSTGRES_PASSWORD").unwrap_or(String::from("root"))
+        ),
+    };
 
     println!("Connection string: {}", db_connection_string);
 
     rt.block_on(async {
         // Connect to the database.
         if let Ok((client, connection)) =
-            tokio_postgres::connect(db_connection_string, tokio_postgres::NoTls).await
+            tokio_postgres::connect(&db_connection_string, tokio_postgres::NoTls).await
         {
             println!("Working...");