Add build and run commands with Dockerfile

Dockerfile

@@ -0,0 +1,7 @@
+FROM rust:1.88
+
+WORKDIR /src
+COPY . .
+
+RUN cargo build --release
+CMD ["./target/release/lwn-sub-snoozer", "/rss/lwn-sub.xml"]

justfile

@@ -1,7 +1,30 @@
+set dotenv-load
+
+POSTGRES_HOST := 'lwn-sub-snoozer_db'
+
 clean:
 	rm -rf target
-	podman network rm lwn-sub-snoozer || true
+	podman network rm lwn-sub-snoozer_network || true
 
-db:
+init_db:
-	podman network create lwn-sub-snoozer || true
+	podman network create lwn-sub-snoozer_network || true
-	podman run --name postgres --rm -p 5432:5432 --network=lwn-sub-snoozer -e POSTGRES_DB=dev -e POSTGRES_USER=root -e POSTGRES_PASSWORD=root docker.io/postgres:alpine
+	podman run --rm -d --replace \
+	    --name {{POSTGRES_HOST}} \
+		--network=lwn-sub-snoozer_network \
+		-p 5432:5432 \
+		--env-file .env \
+		docker.io/postgres:alpine
+
+init_app:
+    podman build --tag lwn-sub-snoozer_app:latest .
+
+init: init_db init_app
+
+run:
+    podman run --rm \
+      --name lwn-sub-snoozer_app \
+      --network lwn-sub-snoozer_network \
+      -e POSTGRES_HOST={{POSTGRES_HOST}} \
+      --env-file .env \
+      --volume /tmp/lwn_sub:/rss \
+      lwn-sub-snoozer_app:latest