add: support for custom error handling (#201)

* add: devcontaier (codespaces)

* add: custom errors & other stuff lmao

* fixes #199

.devcontainer/docker-compose.yml

@@ -0,0 +1,41 @@
+version: '3.8'
+
+services:
+  app:
+    build:
+      context: .
+      dockerfile: Dockerfile
+      args:
+        # Update 'VARIANT' to pick an LTS version of Node.js: 18, 16, 14.
+        # Append -bullseye or -buster to pin to an OS version.
+        # Use -bullseye variants on local arm64/Apple Silicon.
+        VARIANT: "18"
+
+    volumes:
+      - ..:/workspace:cached
+
+    # Overrides default command so things don't shut down after the process ends.
+    command: sleep infinity
+
+    # Runs app on the same network as the database container, allows "forwardPorts" in devcontainer.json function.
+    network_mode: service:db
+    # Uncomment the next line to use a non-root user for all processes.
+    # user: node
+
+    # Use "forwardPorts" in **devcontainer.json** to forward an app port locally. 
+    # (Adding the "ports" property to this file will not forward from a Codespace.)
+
+  db:
+    image: postgres:latest
+    restart: unless-stopped
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
+    environment:
+      POSTGRES_PASSWORD: postgres
+      POSTGRES_USER: postgres
+      POSTGRES_DB: postgres
+    # Add "forwardPorts": ["5432"] to **devcontainer.json** to forward PostgreSQL locally.
+    # (Adding the "ports" property to this file will not forward from a Codespace.)
+
+volumes:
+  postgres-data: null