diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
new file mode 100644
index 00000000..2cc67040
--- /dev/null
+++ b/.devcontainer/Dockerfile
@@ -0,0 +1,15 @@
+FROM mcr.microsoft.com/devcontainers/ruby:1-3.1-bullseye
+
+# Default value to allow debug server to serve content over GitHub Codespace's port forwarding service
+# The value is a comma-separated list of allowed domains 
+ENV RAILS_DEVELOPMENT_HOSTS=".githubpreview.dev,.preview.app.github.dev,.app.github.dev"
+
+# [Optional] Uncomment this section to install additional OS packages.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>
+
+# [Optional] Uncomment this line to install additional gems.
+# RUN gem install <your-gem-names-here>
+
+# [Optional] Uncomment this line to install global node packages.
+# RUN su vscode -c "source /usr/local/share/nvm/nvm.sh && npm install -g <your-package-here>" 2>&1
diff --git a/.devcontainer/create-db.sql b/.devcontainer/create-db.sql
new file mode 100644
index 00000000..b5a805a1
--- /dev/null
+++ b/.devcontainer/create-db.sql
@@ -0,0 +1,5 @@
+CREATE DATABASE openneo_impress;
+GRANT ALL PRIVILEGES ON openneo_impress.* TO impress_dev;
+
+CREATE DATABASE openneo_id;
+GRANT ALL PRIVILEGES ON openneo_id.* TO impress_dev;
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
new file mode 100644
index 00000000..56ca1e0f
--- /dev/null
+++ b/.devcontainer/devcontainer.json
@@ -0,0 +1,44 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/ruby-rails-postgres
+{
+  "name": "Dress to Impress",
+  "dockerComposeFile": "docker-compose.yml",
+  "service": "app",
+  "workspaceFolder": "/workspaces/${localWorkspaceFolderBasename}",
+  "features": {
+    "ghcr.io/devcontainers/features/node:1": {
+      "nodeGypDependencies": true,
+      "version": "lts"
+    }
+  },
+
+  // Features to add to the dev container. More info: https://containers.dev/features.
+  // "features": {},
+
+  // Use 'forwardPorts' to make a list of ports inside the container available locally.
+  // This can be used to network with other containers or the host.
+  "forwardPorts": [3000],
+
+  // Use 'postCreateCommand' to run commands after the container is created.
+  "postCreateCommand": ".devcontainer/post-create.sh",
+
+  "containerEnv": {
+    // Because the database is hosted on the local network at the hostname `db`,
+    // we partially override `config/database.yml` to connect to `db`!
+    "DATABASE_URL_PRIMARY_DEV": "mysql2://db",
+    "DATABASE_URL_OPENNEO_ID_DEV": "mysql2://db",
+
+    // HACK: Out of the box, this dev container doesn't allow installation to
+    // the default GEM_HOME, because of a weird thing going on with RVM.
+    // Instead, we set a custom GEM_HOME and GEM_PATH in our home directory!
+    // https://github.com/devcontainers/templates/issues/188
+    "GEM_HOME": "~/.rubygems",
+    "GEM_PATH": "~/.rubygems"
+  }
+
+  // Configure tool-specific properties.
+  // "customizations": {},
+
+  // Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+  // "remoteUser": "root"
+}
diff --git a/.devcontainer/docker-compose.yml b/.devcontainer/docker-compose.yml
new file mode 100644
index 00000000..87dae876
--- /dev/null
+++ b/.devcontainer/docker-compose.yml
@@ -0,0 +1,29 @@
+version: '3'
+
+services:
+  app:
+    build:
+      context: ..
+      dockerfile: .devcontainer/Dockerfile
+
+    volumes:
+      - ../..:/workspaces: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
+
+    # 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: mysql:latest
+    restart: unless-stopped
+    volumes:
+      - ./create-db.sql:/docker-entrypoint-initdb.d/create-db.sql
+    environment:
+      MYSQL_ROOT_PASSWORD: impress_dev
+      MYSQL_USER: impress_dev
+      MYSQL_PASSWORD: impress_dev
diff --git a/.devcontainer/post-create.sh b/.devcontainer/post-create.sh
new file mode 100755
index 00000000..1aff43ad
--- /dev/null
+++ b/.devcontainer/post-create.sh
@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+set -e # Quit if any part of this script fails.
+
+# Mark all git repositories as safe to execute, including cached gems.
+# NOTE: This would be dangerous to run on a normal multi-user machine,
+# but for a dev container that only we use, it should be fine!
+git config --global safe.directory '*'
+
+# Install the app's Ruby gem dependencies.
+bundle install
+
+# Set up the databases: create the schema, and load in some default data.
+bin/rails db:schema:load db:seed
+
+# Install the app's JS dependencies.
+yarn install
+
+# Run a first-time build of the app's JS, in development mode.
+yarn build:dev
diff --git a/config/database.yml b/config/database.yml
index c17385f8..81a389e9 100644
--- a/config/database.yml
+++ b/config/database.yml
@@ -1,18 +1,24 @@
 development:
   primary:
+    # You can override these default settings with this environment variable,
+    # fully or partially. We do this in the .devcontainer setup!
+    url: <%= ENV['DATABASE_URL_PRIMARY_DEV'] %>
     adapter: mysql2
     database: openneo_impress
-    username: openneo_impress
-    password: openneo_impress
+    username: impress_dev
+    password: impress_dev
     pool: 5
     variables:
       sql_mode: TRADITIONAL
 
   openneo_id:
+    # You can override these default settings with this environment variable,
+    # fully or partially. We do this in the .devcontainer setup!
+    url: <%= ENV['DATABASE_URL_OPENNEO_ID_DEV'] %>
     adapter: mysql2
     database: openneo_id
-    username: openneo_impress
-    password: openneo_impress
+    username: impress_dev
+    password: impress_dev
     pool: 2
     variables:
       sql_mode: TRADITIONAL
diff --git a/package.json b/package.json
index 98488824..f341db16 100644
--- a/package.json
+++ b/package.json
@@ -31,6 +31,7 @@
   },
   "scripts": {
     "build": "esbuild app/javascript/*.* --bundle --sourcemap --outdir=app/assets/builds --public-path=/assets --asset-names=[name]-[hash].digested --loader:.js=jsx --loader:.png=file --loader:.svg=file --loader:.min.js=text",
-    "dev": "yarn build --watch --public-path=/dev-assets"
+    "build:dev": "yarn build --public-path=/dev-assets",
+    "dev": "yarn build:dev --watch"
   }
 }
diff --git a/vendor/.gitignore b/vendor/.gitignore
new file mode 100644
index 00000000..3bd6b832
--- /dev/null
+++ b/vendor/.gitignore
@@ -0,0 +1 @@
+/bundle
\ No newline at end of file