diff --git a/.dockerignore b/.dockerignore
index a23c257..6ab80c4 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -2,4 +2,5 @@
 .git
 **/dist
 **/tsconfig.tsbuildinfo
-data
\ No newline at end of file
+data
+postgres-data
diff --git a/.github/workflows/ci-checks.yml b/.github/workflows/ci-checks.yml
index 82f5cd8..5e9b138 100644
--- a/.github/workflows/ci-checks.yml
+++ b/.github/workflows/ci-checks.yml
@@ -11,18 +11,26 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v3
 
+      - uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: 1.3.14
+
+      # Jest still runs on Node until tests move to `bun test`
       - uses: actions/setup-node@v3
         with:
           node-version: 20
 
       - name: Install dependencies
-        run: yarn install
+        run: bun install --frozen-lockfile
+
+      - name: Type check
+        run: bun run type-check
 
       - name: Build
-        run: yarn build
+        run: bun run build
 
       - name: Lint
-        run: yarn lint
+        run: bun run lint
 
       - name: Test
-        run: yarn test
+        run: bun run test
diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index 9bf278c..3c784a7 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -14,7 +14,7 @@ jobs:
         run: docker-compose -f docker-compose.testing.yml build base backend app-test cypress
 
       - name: Build Test Quests
-        run: docker-compose -f docker-compose.testing.yml run --rm backend yarn build:quests
+        run: docker-compose -f docker-compose.testing.yml run --rm backend bun run build:quests
 
       - name: Run Cypress Tests
         env:
diff --git a/.vscode/launch.json b/.vscode/launch.json
index 91e6bfc..afab9b7 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -4,10 +4,10 @@
     {
       "type": "node",
       "request": "launch",
-      "name": "File Graph Yarn Jest",
-      "runtimeExecutable": "yarn",
-      "args": ["test", "--runInBand"],
-      "cwd": "${workspaceFolder}/packages/file-graph",
+      "name": "File Graph Jest",
+      "runtimeExecutable": "bun",
+      "args": ["run", "test", "packages/file-graph", "--runInBand"],
+      "cwd": "${workspaceFolder}",
       "console": "integratedTerminal",
       "internalConsoleOptions": "neverOpen"
     }
diff --git a/README.md b/README.md
index 7643e06..3dcaa89 100644
--- a/README.md
+++ b/README.md
@@ -5,16 +5,15 @@
 
 ## TLDR
 
-    yarn install
+    bun install
     cp .env.sample .env
     docker compose up -d
-    yarn dev
+    bun run dev
 
 ## Requirements
 
-- NodeJS v20+
+- Bun: v1.3+
 - Docker
-- Yarn: v1.22
 
 ## Known Issues
 
@@ -26,7 +25,7 @@ Windows user please refer to [docs/windows-setup.md](docs/windows-setup.md) for
 
     git clone https://github.com/lancatlin/linux-odyssey.git
     cd linux-odyssey
-    yarn install
+    bun install
 
 ## Project Structures
 
@@ -104,7 +103,7 @@ Customized `entrypoint.sh` for each quest is not yet supported.
 
 To build all quests:
 
-    yarn build:quests
+    bun run build:quests
 
 The base image is built with docker-compose, so you can use `docker compose build base` to rebuild it. Once you rebuild the base image, you have to rebuild all quests.
 
@@ -134,11 +133,11 @@ Copy `.env.sample` to `.env` and customize it for your needs.
 
 Run dev server (frontend, backend):
 
-    yarn dev
+    bun run dev
 
 To develop analytics dashboard:
 
-    yarn analytics
+    bun run analytics
 
 The default username and password is `alex` and `Alex1234`.
 
@@ -146,12 +145,12 @@ The default username and password is `alex` and `Alex1234`.
 
 Unit tests:
 
-    yarn test:unit
+    bun run test
 
 Run Cypress locally, using the current development containers:
 
     docker compose up -d
-    yarn test:e2e
+    bun run test:e2e
 
 Run Cypress in container, create brand-new containers along with it:
 
@@ -183,7 +182,7 @@ Start the service
 
     # Server side
     docker compose -f docker-compose.prod.yml pull
-    yarn build:quests
+    bun run build:quests
     docker compose -f docker-compose.prod.yml up -d
 
 ### Necessary Configuration
@@ -197,4 +196,4 @@ You can copy from `.env.sample`
 
 You can generate a random key by running
 
-    yarn setup
+    bun run setup
diff --git a/app/Dockerfile b/app/Dockerfile
index 3c3e03b..8ede7a2 100644
--- a/app/Dockerfile
+++ b/app/Dockerfile
@@ -1,17 +1,24 @@
 # Base stage
-FROM node:20-alpine AS build
+FROM oven/bun:1.3.14-alpine AS build
 
 WORKDIR /app
-COPY package.json yarn.lock ./
+COPY package.json bun.lock ./
 COPY app/package.json ./app/package.json
 COPY server/package.json ./server/package.json
-RUN yarn install --frozen-lockfile
+COPY services/analytics/package.json ./services/analytics/package.json
+COPY tests/package.json ./tests/package.json
+COPY packages/constants/package.json ./packages/constants/package.json
+COPY packages/file-graph/package.json ./packages/file-graph/package.json
+COPY packages/game/package.json ./packages/game/package.json
+COPY packages/models/package.json ./packages/models/package.json
+COPY packages/utils/package.json ./packages/utils/package.json
+RUN bun install --frozen-lockfile --filter app
 
 COPY tsconfig.json ./tsconfig.json
 COPY server ./server
 COPY packages ./packages
 COPY app ./app
-RUN yarn workspace app build
+RUN bun run --filter app build
 
 # Production stage
 FROM nginx:stable-alpine AS prod
diff --git a/bun.lock b/bun.lock
index 4f2c266..09383dd 100644
--- a/bun.lock
+++ b/bun.lock
@@ -102,6 +102,7 @@
       "name": "@odyssey/models",
       "version": "0.0.0",
       "dependencies": {
+        "@odyssey/constants": "workspace:*",
         "mongoose": "^8.24.1",
       },
     },
diff --git a/docs/windows-setup.md b/docs/windows-setup.md
index 5ae49ce..a58cdd5 100644
--- a/docs/windows-setup.md
+++ b/docs/windows-setup.md
@@ -81,22 +81,23 @@ curl -fsSL https://deb.nodesource.com/setup_20.x | sudo -E bash -
 sudo apt install -y nodejs
 ```
 
-### Install Yarn 1.22
+### Install Bun
 
 ```bash
-sudo npm install -g yarn@1.22.22
+curl -fsSL https://bun.sh/install | bash
 ```
 
+Restart your terminal (or run `source ~/.bashrc`) so `bun` is on your `PATH`.
+
 Verify the installations:
 
 ```bash
 git --version
 node --version
-npm --version
-yarn --version
+bun --version
 ```
 
-The Node.js version should be `20.x` or later, and the Yarn version should be `1.22.x`.
+The Node.js version should be `20.x` or later, and the Bun version should be `1.3` or later.
 
 ## 4. Clone the Project
 
@@ -130,10 +131,10 @@ code .
 From the project root, run:
 
 ```bash
-yarn install
+bun install
 ```
 
-Warnings during installation may be harmless. The installation succeeded if Yarn finishes with a `Done` message and does not display `error Command failed`.
+Warnings during installation may be harmless. The installation succeeded if Bun finishes with an `installed` message and does not display an `error:` message.
 
 If a `gyp` error appears, confirm that it belongs to an optional dependency before ignoring it.
 
@@ -180,7 +181,7 @@ docker compose down
 Start the frontend and backend development servers:
 
 ```bash
-yarn dev
+bun run dev
 ```
 
 Keep the terminal running and open the following address in your browser:
@@ -194,5 +195,5 @@ To stop the development servers, press `Ctrl+C`.
 You can verify that the project builds successfully by running:
 
 ```bash
-yarn build
+bun run build
 ```
diff --git a/packages/game/Session.ts b/packages/game/Session.ts
index 1fde8b6..eeef16e 100644
--- a/packages/game/Session.ts
+++ b/packages/game/Session.ts
@@ -1,4 +1,4 @@
-import { FileGraph, IFileNode } from '../file-graph'
+import { FileGraph, IFileNode } from '@odyssey/file-graph'
 import { Quest } from './Quest'
 import {
   IQuest,
diff --git a/packages/models/package.json b/packages/models/package.json
index 85bf0f5..a235df9 100644
--- a/packages/models/package.json
+++ b/packages/models/package.json
@@ -8,6 +8,7 @@
     ".": "./index.ts"
   },
   "dependencies": {
+    "@odyssey/constants": "workspace:*",
     "mongoose": "^8.24.1"
   }
 }
diff --git a/packages/models/session.ts b/packages/models/session.ts
index 9872be8..9b3c993 100644
--- a/packages/models/session.ts
+++ b/packages/models/session.ts
@@ -1,6 +1,6 @@
 import { model, Schema, Types } from 'mongoose'
-import type { QuestLocale } from '../constants'
-import { SUPPORTED_LOCALES } from '../constants'
+import type { QuestLocale } from '@odyssey/constants'
+import { SUPPORTED_LOCALES } from '@odyssey/constants'
 
 export interface INode {
   path: string
diff --git a/server/Dockerfile b/server/Dockerfile
index f2b5e93..6905f19 100644
--- a/server/Dockerfile
+++ b/server/Dockerfile
@@ -1,27 +1,28 @@
-FROM node:20-alpine AS build
+FROM oven/bun:1.3.14-alpine AS prod
 
 WORKDIR /app
-COPY ./package.json yarn.lock ./
+COPY package.json bun.lock ./
+COPY app/package.json ./app/package.json
 COPY server/package.json ./server/package.json
-RUN yarn install
+COPY services/analytics/package.json ./services/analytics/package.json
+COPY tests/package.json ./tests/package.json
+COPY packages/constants/package.json ./packages/constants/package.json
+COPY packages/file-graph/package.json ./packages/file-graph/package.json
+COPY packages/game/package.json ./packages/game/package.json
+COPY packages/models/package.json ./packages/models/package.json
+COPY packages/utils/package.json ./packages/utils/package.json
+RUN bun install --frozen-lockfile --production --filter server
+
 # Install docker cli
-COPY server ./server
-COPY packages ./packages
-COPY tsconfig.json ./tsconfig.json
-RUN yarn workspace server build
-
-# Production
-FROM node:20-alpine AS prod
-
-WORKDIR /app
 COPY --from=docker:dind /usr/local/bin/docker /usr/local/bin/
-COPY --from=build /app/node_modules ./node_modules
-COPY --from=build /app/server ./server
+COPY tsconfig.json ./tsconfig.json
+COPY packages ./packages
+COPY server ./server
 COPY ./quests ./quests
 
 ENV NODE_ENV=production
 WORKDIR /app/server
-CMD [ "yarn", "start" ]
+CMD [ "bun", "src/index.ts" ]
 
 ENV HOST=0.0.0.0
 ENV PORT=3000
diff --git a/server/src/index.ts b/server/src/index.ts
index ad48f98..68a6531 100644
--- a/server/src/index.ts
+++ b/server/src/index.ts
@@ -24,7 +24,7 @@ import { createContext } from './trpc.js'
 async function main() {
   if (!config.secret) {
     logger.error(
-      'No SECRET_KEY found in .env! To set up a persistent key, please run `yarn setup`:'
+      'No SECRET_KEY found in .env! To set up a persistent key, please run `bun run setup`:'
     )
     process.exit(1)
   }
diff --git a/services/analytics/Dockerfile b/services/analytics/Dockerfile
index 973c62c..e89c520 100644
--- a/services/analytics/Dockerfile
+++ b/services/analytics/Dockerfile
@@ -1,27 +1,26 @@
-FROM node:20-alpine AS build
+FROM oven/bun:1.3.14-alpine AS prod
 
 WORKDIR /app
-COPY ./package.json yarn.lock ./
+COPY package.json bun.lock ./
+COPY app/package.json ./app/package.json
+COPY server/package.json ./server/package.json
 COPY services/analytics/package.json ./services/analytics/package.json
-RUN yarn install --frozen-lockfile
+COPY tests/package.json ./tests/package.json
+COPY packages/constants/package.json ./packages/constants/package.json
+COPY packages/file-graph/package.json ./packages/file-graph/package.json
+COPY packages/game/package.json ./packages/game/package.json
+COPY packages/models/package.json ./packages/models/package.json
+COPY packages/utils/package.json ./packages/utils/package.json
+RUN bun install --frozen-lockfile --production --filter analytics
 
 COPY tsconfig.json ./tsconfig.json
 COPY packages ./packages
 COPY services/analytics ./services/analytics
 
-RUN yarn workspace analytics build
-
-# Production stage
-FROM node:20-alpine AS prod
-
-WORKDIR /app
-COPY --from=build /app/node_modules ./node_modules
-COPY --from=build /app/services/analytics ./services/analytics
-
 ENV NODE_ENV=production
 ENV HOST=0.0.0.0
 ENV PORT=3001
 EXPOSE 3001
 
 WORKDIR /app/services/analytics
-CMD [ "yarn", "start" ]
\ No newline at end of file
+CMD [ "bun", "src/index.ts" ]
diff --git a/tests/Dockerfile b/tests/Dockerfile
index d5c96d2..d51f4dd 100644
--- a/tests/Dockerfile
+++ b/tests/Dockerfile
@@ -1,12 +1,22 @@
 FROM cypress/browsers
 
+COPY --from=oven/bun:1.3.14 /usr/local/bin/bun /usr/local/bin/bun
+
 WORKDIR /e2e
-COPY package.json yarn.lock ./
+COPY package.json bun.lock ./
+COPY app/package.json ./app/package.json
+COPY server/package.json ./server/package.json
+COPY services/analytics/package.json ./services/analytics/package.json
 COPY tests/package.json ./tests/package.json
-RUN yarn install --frozen-lockfile
+COPY packages/constants/package.json ./packages/constants/package.json
+COPY packages/file-graph/package.json ./packages/file-graph/package.json
+COPY packages/game/package.json ./packages/game/package.json
+COPY packages/models/package.json ./packages/models/package.json
+COPY packages/utils/package.json ./packages/utils/package.json
+RUN bun install --frozen-lockfile
 
 COPY quests ./quests
 COPY tests ./tests
 WORKDIR /e2e/tests
 
-CMD [ "yarn", "test" ]
+CMD [ "bun", "run", "test" ]
diff --git a/tests/package.json b/tests/package.json
index 885c84b..b5f181e 100644
--- a/tests/package.json
+++ b/tests/package.json
@@ -6,8 +6,8 @@
   "type": "commonjs",
   "license": "MIT",
   "scripts": {
-    "test": "yarn cypress run",
-    "test:open": "yarn cypress open"
+    "test": "cypress run",
+    "test:open": "cypress open"
   },
   "dependencies": {
     "@testing-library/cypress": "^10.0.1",