Complete refactor of environment configuration and Docker setup for development and production.

- Dev and prod both now run with the same exact docker configuration, except the .env file copied in.
- Removed the `.env` file and added a new `.env.dev` file for development settings, including database configuration and API keys.
- Introduced a `.envrc` file for automatic venv activation.
- Updated `deploy.sh` to utilize `uv` for running management commands and added a command for building Tailwind CSS.
- Created `docker-compose.yml` for local development with PostgreSQL, ensuring proper service dependencies.
- Deleted unnecessary files such as `docker-compose_db_only.yml` and `requirements.txt` to streamline the project structure.

docker-compose.yml

@@ -0,0 +1,26 @@
+services:
+  web:
+    build:
+      context: .
+      dockerfile: Dockerfile
+      args:
+        ENV_FILE: .env.dev
+    volumes:
+      - .:/code:z
+    ports:
+      - 8000:8000
+    depends_on:
+      - db
+  db:
+    image: postgres:16
+    ports:
+      - 5432:5432
+    volumes:
+      - postgres_data:/var/lib/postgresql/data/
+    environment:
+      - "POSTGRES_HOST_AUTH_METHOD=trust"
+
+volumes:
+  postgres_data:
+    labels:
+      - "db_is_resettable_via_script"