diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..ce9f5f6
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License Copyright (c) 2023 Sebastien Castiel
+
+Permission is hereby granted,
+free of charge, to any person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to the
+following conditions:
+
+The above copyright notice and this permission notice
+(including the next paragraph) shall be included in all copies or substantial
+portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
+EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
\ No newline at end of file
diff --git a/README.md b/README.md
index c403366..f3cebf3 100644
--- a/README.md
+++ b/README.md
@@ -1,36 +1,31 @@
-This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app).
+# [Spliit](https://spliit.app)
 
-## Getting Started
+Spliit is a free and open source alternative to Splitwise. I created it back in 2022 as a side project to learn the Go language, but rewrote it with Next.js since.
 
-First, run the development server:
+## Features
 
-```bash
-npm run dev
-# or
-yarn dev
-# or
-pnpm dev
-# or
-bun dev
-```
+- [x] Create a group and share it with friends
+- [x] Create expenses with description
+- [x] Display group balances
+- [x] Create reimbursement expenses
+- [x] Progressive Web App
 
-Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
+### Work in progress
 
-You can start editing the page by modifying `app/page.tsx`. The page auto-updates as you edit the file.
+- [ ] Select all/no participant for expenses
+- [ ] Tell the application who you are when opening a group
 
-This project uses [`next/font`](https://nextjs.org/docs/basic-features/font-optimization) to automatically optimize and load Inter, a custom Google Font.
+## Stack
 
-## Learn More
+- [Next.js](https://nextjs.org/) for the web application
+- [TailwindCSS](https://tailwindcss.com/) for the styling
+- [shadcn/UI](https://ui.shadcn.com/) for the UI components
+- [Vercel](https://vercel.com/) for hosting (application and database)
 
-To learn more about Next.js, take a look at the following resources:
+## Contribute
 
-- [Next.js Documentation](https://nextjs.org/docs) - learn about Next.js features and API.
-- [Learn Next.js](https://nextjs.org/learn) - an interactive Next.js tutorial.
+The project is open to contributions. Feel free to open an issue or even a pull-request!
 
-You can check out [the Next.js GitHub repository](https://github.com/vercel/next.js/) - your feedback and contributions are welcome!
+## License
 
-## Deploy on Vercel
-
-The easiest way to deploy your Next.js app is to use the [Vercel Platform](https://vercel.com/new?utm_medium=default-template&filter=next.js&utm_source=create-next-app&utm_campaign=create-next-app-readme) from the creators of Next.js.
-
-Check out our [Next.js deployment documentation](https://nextjs.org/docs/deployment) for more details.
+MIT, see [LICENSE](./LICENSE).
diff --git a/src/app/page.tsx b/src/app/page.tsx
index 77dfed0..e1b43e0 100644
--- a/src/app/page.tsx
+++ b/src/app/page.tsx
@@ -33,16 +33,6 @@ export default function HomePage() {
                 Create a group
               </Link>
             </Button>
-            <Button asChild variant="secondary" size="lg">
-              <a
-                target="_blank"
-                rel="noreferrer"
-                href="https://github.com/scastiel/spliit2"
-              >
-                <Github className="w-4 h-4 mr-2" />
-                GitHub
-              </a>
-            </Button>
           </div>
         </div>
       </section>
diff --git a/src/scripts/migrate.ts b/src/scripts/migrate.ts
index bf7d93c..beeecc1 100644
--- a/src/scripts/migrate.ts
+++ b/src/scripts/migrate.ts
@@ -10,6 +10,9 @@ async function main() {
   withClient(async (client) => {
     const prisma = await getPrisma()
 
+    // console.log('Deleting all groups…')
+    // await prisma.group.deleteMany({})
+
     const { rows: groupRows } = await client.query<{
       id: string
       name: string
@@ -17,6 +20,10 @@ async function main() {
       created_at: Date
     }>('select id, name, currency, created_at from groups')
 
+    const existingGroups = (
+      await prisma.group.findMany({ select: { id: true } })
+    ).map((group) => group.id)
+
     for (const groupRow of groupRows) {
       const participants: Prisma.ParticipantCreateManyInput[] = []
       const expenses: Prisma.ExpenseCreateManyInput[] = []
@@ -24,10 +31,7 @@ async function main() {
       const participantIdsMapping: Record<number, string> = {}
       const expenseIdsMapping: Record<number, string> = {}
 
-      const existingGroup = await prisma.group.findUnique({
-        where: { id: groupRow.id },
-      })
-      if (existingGroup) {
+      if (existingGroups.includes(groupRow.id)) {
         console.log(`Group ${groupRow.id} already exists, skipping.`)
         continue
       }
@@ -65,7 +69,7 @@ async function main() {
         paid_by_participant_id: number
         is_reimbursement: boolean
       }>(
-        'select id, created_at, description, amount, paid_by_participant_id, is_reimbursement from expenses where group_id = $1::text',
+        'select id, created_at, description, amount, paid_by_participant_id, is_reimbursement from expenses where group_id = $1::text and deleted_at is null',
         [groupRow.id],
       )
       for (const expenseRow of expenseRows) {