💚 add workflows

.github/workflows/contracts_build.yml

@@ -0,0 +1,16 @@
+name: Build
+
+on: [push, pull_request]
+
+permissions: read-all
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: software-mansion/setup-scarb@v1
+      - name: Check cairo format
+        run: scarb fmt --check
+      - name: Build cairo programs
+        run: scarb build

.github/workflows/contracts_test.yml

@@ -0,0 +1,16 @@
+name: Test
+
+on: [push, pull_request]
+permissions: read-all
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: software-mansion/setup-scarb@v1
+      - uses: foundry-rs/setup-snfoundry@v2
+        with:
+          starknet-foundry-version: 0.12.0
+      - name: Run cairo tests
+        run: snforge test unit_tests

README.md

@@ -7,6 +7,10 @@
   <strong>Starknet <> Celestia bridge</strong>
 </p>
 
+Blobstream Starknet is a port of [Celestia blobstream contracts](https://github.com/celestiaorg/blobstream-contracts) in [Cairo](https://book.cairo-lang.org/) for [Starknet](https://starknet.io/).
+
+> This project is under active development and should not be used in production.
+
 ## 🛠️ Build
 
 To build the project, run: