feat: add release workflow and install script

- GitHub Actions workflow builds static binary on tag push
- Simple curl-based install script for non-Nix users
- Fix .gitignore to not match cmd/devproxy directory

Author: alysnnix

.github/workflows/release.yml

@@ -0,0 +1,27 @@
+name: Release
+
+on:
+  push:
+    tags: ["v*"]
+
+permissions:
+  contents: write
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+
+      - name: Build
+        run: CGO_ENABLED=0 go build -ldflags="-s -w" -o devproxy ./cmd/devproxy
+
+      - name: Create release
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          TAG: ${{ github.ref_name }}
+        run: gh release create "$TAG" devproxy --title "$TAG" --generate-notes

.gitignore

@@ -1,2 +1,2 @@
-devproxy
-result
+/devproxy
+/result

install.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+set -e
+
+REPO="alysnnix/devproxy"
+INSTALL_DIR="/usr/local/bin"
+
+TAG=$(curl -fsSL "https://api.github.com/repos/${REPO}/releases/latest" | grep '"tag_name"' | cut -d'"' -f4)
+
+if [ -z "$TAG" ]; then
+    echo "error: could not determine latest release" >&2
+    exit 1
+fi
+
+echo "Installing devproxy ${TAG}..."
+
+curl -fsSL "https://github.com/${REPO}/releases/download/${TAG}/devproxy" -o /tmp/devproxy
+install -m 755 /tmp/devproxy "${INSTALL_DIR}/devproxy"
+rm -f /tmp/devproxy
+
+echo "devproxy ${TAG} installed to ${INSTALL_DIR}/devproxy"