Create first CI job (#5)

Installs ignite, builds pocketd (3m30s), and runs tests (2m30s).

.github/workflows/go.yml

@@ -0,0 +1,34 @@
+# This workflow will build a golang project
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-go
+
+name: Ignite build & test
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: install ignite
+        run: |
+          curl https://get.ignite.com/cli! | bash
+          ignite version
+
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: "0" # Per https://github.com/ignite/cli/issues/1674#issuecomment-1144619147
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: "1.20"
+
+      - name: Build
+        run: ignite chain build --debug
+
+      - name: Test
+        run: go test -v ./...