build: add github CI and badge

.github/workflows/ci.yml

@@ -0,0 +1,38 @@
+name: Test and build
+
+on:
+  push:
+    branches:
+      - master
+      
+jobs:
+  test_nostr-rs-relay:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Update local toolchain
+        run: |
+          rustup update
+          rustup component add clippy
+          rustup install nightly          
+
+      - name: Toolchain info
+        run: |
+          cargo --version --verbose
+          rustc --version
+          cargo clippy --version          
+
+      # - name: Lint
+      #   run: |
+      #     cargo fmt -- --check
+      #     cargo clippy -- -D warnings          
+
+      - name: Test
+        run: |
+          cargo check
+          cargo test --all          
+
+      - name: Build
+        run: |
+          cargo build --release 

README.md

@@ -10,6 +10,9 @@ mirrored on [GitHub](https://github.com/scsibug/nostr-rs-relay).
 
 [![builds.sr.ht status](https://builds.sr.ht/~gheartsfield/nostr-rs-relay/commits/master.svg)](https://builds.sr.ht/~gheartsfield/nostr-rs-relay/commits/master?)
 
+![Github CI](https://github.com/schlunsen/nostr-rs-relay/actions/workflows/ci.yml/badge.svg)
+
+
 ## Features
 
 [NIPs](https://github.com/nostr-protocol/nips) with a relay-specific implementation are listed here.