diff --git a/justfile b/justfile
index c7b587a..5e9a45e 100644
--- a/justfile
+++ b/justfile
@@ -1,10 +1,17 @@
+[private]
 default:
   @just --list
 
+# create venv, install dependencies
 setup:
   uv sync
+  # install the other tools: prek, mise
 
-# run Textual's console
+# builds a package (tgz and whl)
+build:
+  uv build
+
+# console to observe log messages
 console:
   uv run textual console
 
@@ -14,42 +21,50 @@ the_app := "teilchensammler_cli.main"
 run-dev:
   uv run textual run --dev {{ the_app }}
 
+# run the app
 run:
   uv run python -m {{ the_app }}
 
 uv_export_options := "--frozen --format requirements.txt --quiet --no-install-project"
+# export dependencies into requirements files
 exports-deps:
   uv export {{ uv_export_options }} --output-file requirements.txt
   uv export {{ uv_export_options }} --output-file requirements.dev.txt --only-dev
 
-install-deps: setup
-
+# Update dependencies to new versions
 update-deps:
   uv lock --upgrade
   uv sync
 
+# Run tests, args are passed-through to pytest
 test *ARGS:
   uv run pytest tests.py {{ ARGS }}
 
+# run tests and create coverage reports
 coverage:
   uv run pytest tests.py --cov=src/ --cov-report term --cov-report xml --cov-report html --cov-config pyproject.toml
 
+# lint python code
 lint-python:
   uv run ruff check .
 
+# lint markdown documents
 lint-markdown:
   markdownlint-cli2 .
 
+# run python and markdown
 lint: lint-python lint-markdown
 
 # remove artefacts from dist/
 clean:
   rm dist/*.whl dist/*.tar.gz
 
+# pretend we are CI
 ci: lint
   prek run --all-files
 #   woodpecker-cli exec "whatever"
 
+# create a new realese [CURRENTLY USELESS]
 release:
   @echo remember to git tag and update pyproject.toml
   uv build
diff --git a/mise.toml b/mise.toml
index 7592ec1..ffbd3a8 100644
--- a/mise.toml
+++ b/mise.toml
@@ -1,5 +1,6 @@
 [env]
 '_'.python.venv = { path = ".venv", create = true }
+DATABASE_URL = "sqlite:///database.db"
 
 [tools]
 markdownlint-cli2 = "latest"
diff --git a/src/teilchensammler_cli/database.py b/src/teilchensammler_cli/database.py
index d919349..e226215 100644
--- a/src/teilchensammler_cli/database.py
+++ b/src/teilchensammler_cli/database.py
@@ -1,6 +1,8 @@
+import os
 from sqlmodel import SQLModel, create_engine
 
-sqlite_url = "sqlite:///database.db"  # TODO: get url from environment
+
+sqlite_url = os.environ.get("DATABASE_URL", "sqlite:///database.db")
 engine = create_engine(sqlite_url, echo=True)
 
 
diff --git a/src/teilchensammler_cli/models.py b/src/teilchensammler_cli/models.py
index 7a49d5c..86233f4 100644
--- a/src/teilchensammler_cli/models.py
+++ b/src/teilchensammler_cli/models.py
@@ -77,6 +77,6 @@ async def load_initial_data() -> Sequence[Teilchen]:
     with Session(engine) as session:
         statement = select(
             Teilchen.id, Teilchen.name, Teilchen.description, Teilchen.number, Teilchen.tags
-        )
+        )  # ty:ignore[no-matching-overload]
         all_teilchen = session.exec(statement).all()
     return all_teilchen
diff --git a/src/teilchensammler_cli/tui.py b/src/teilchensammler_cli/tui.py
index 288bc8a..37c44f9 100644
--- a/src/teilchensammler_cli/tui.py
+++ b/src/teilchensammler_cli/tui.py
@@ -48,7 +48,7 @@ class SearchResults(Widget):
     async def on_mount(self) -> None:
         table: DataTable[None] = self.query_one(DataTable[None])
         _ = table.add_columns(*FAKE_DATA_HEADER)
-        _ = table.add_rows(await load_initial_data())  # ty:ignore[invalid-argument-type]
+        _ = table.add_rows(await load_initial_data())
 
 
 class AddInventoryScreen(Screen[None]):
diff --git a/tests.py b/tests.py
index 61eaf45..521a238 100644
--- a/tests.py
+++ b/tests.py
@@ -1,4 +1,4 @@
-def test_initial_layout(snap_compare):  # pyright: ignore[reportMissingParameterType, reportUnknownParameterType]
+def test_initial_layout(snap_compare):
     from teilchensammler_cli.main import app
 
     assert snap_compare(app, terminal_size=(130, 40))