Add Docker build and Gitea Actions CI for deployment

Multi-stage Alpine Dockerfile producing a standalone Next.js image
with the better-sqlite3 native addon included. Gitea workflow builds
on push to main and on v* tags, pushing to the Gitea registry using
the REGISTRY_URL variable and REGISTRY_TOKEN secret. Compose file
mounts ./data so alerts.db and settings.json persist across restarts.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.dockerignore

@@ -0,0 +1,27 @@
+.git
+.gitea
+.github
+.claude
+.vscode
+.idea
+
+node_modules
+.next
+out
+build
+coverage
+
+data
+.env*
+
+README.md
+*.md
+!package.json
+Dockerfile
+docker-compose*.yml
+.dockerignore
+
+*.log
+.DS_Store
+*.tsbuildinfo
+next-env.d.ts

.gitea/workflows/build.yml

@@ -0,0 +1,48 @@
+name: Build and Push
+
+on:
+  push:
+    branches: [main]
+    tags: ["v*"]
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Derive image reference
+        id: img
+        run: |
+          echo "name=$(echo '${{ github.repository }}' | tr '[:upper:]' '[:lower:]')" >> $GITHUB_OUTPUT
+          echo "sha_short=${GITHUB_SHA::7}" >> $GITHUB_OUTPUT
+
+      - uses: docker/setup-buildx-action@v3
+
+      - uses: docker/login-action@v3
+        with:
+          registry: ${{ vars.REGISTRY_URL }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.REGISTRY_TOKEN }}
+
+      - name: Compute tags
+        id: tags
+        run: |
+          IMAGE="${{ vars.REGISTRY_URL }}/${{ steps.img.outputs.name }}"
+          TAGS="${IMAGE}:${{ steps.img.outputs.sha_short }}"
+          if [ "${{ github.ref }}" = "refs/heads/main" ]; then
+            TAGS="${TAGS},${IMAGE}:latest"
+          fi
+          if [[ "${{ github.ref }}" == refs/tags/v* ]]; then
+            TAGS="${TAGS},${IMAGE}:${GITHUB_REF_NAME}"
+          fi
+          echo "tags=${TAGS}" >> $GITHUB_OUTPUT
+
+      - uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.tags.outputs.tags }}
+          cache-from: type=registry,ref=${{ vars.REGISTRY_URL }}/${{ steps.img.outputs.name }}:buildcache
+          cache-to: type=registry,ref=${{ vars.REGISTRY_URL }}/${{ steps.img.outputs.name }}:buildcache,mode=max

Dockerfile

@@ -0,0 +1,39 @@
+# syntax=docker/dockerfile:1.7
+ARG NODE_VERSION=22-alpine
+
+# ── deps: install node_modules (with native build tools for better-sqlite3) ──
+FROM node:${NODE_VERSION} AS deps
+RUN apk add --no-cache libc6-compat python3 make g++
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci
+
+# ── builder: produce the standalone Next.js bundle ──
+FROM node:${NODE_VERSION} AS builder
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+ENV NEXT_TELEMETRY_DISABLED=1
+RUN npm run build
+
+# ── runner: minimal runtime image ──
+FROM node:${NODE_VERSION} AS runner
+WORKDIR /app
+ENV NODE_ENV=production
+ENV NEXT_TELEMETRY_DISABLED=1
+ENV PORT=3000
+ENV HOSTNAME=0.0.0.0
+
+RUN addgroup --system --gid 1001 nodejs \
+ && adduser --system --uid 1001 nextjs
+
+COPY --from=builder /app/public ./public
+COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
+COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
+
+RUN mkdir -p /app/data && chown nextjs:nodejs /app/data
+
+USER nextjs
+EXPOSE 3000
+VOLUME ["/app/data"]
+CMD ["node", "server.js"]

docker-compose.yml

@@ -0,0 +1,24 @@
+services:
+  oversnitch:
+    image: ${REGISTRY_URL:?set REGISTRY_URL to your Gitea host, e.g. gitea.example.com}/${IMAGE_REPO:-josh/oversnitch}:${IMAGE_TAG:-latest}
+    container_name: oversnitch
+    restart: unless-stopped
+    ports:
+      - "${HOST_PORT:-3000}:3000"
+    volumes:
+      # Persists alerts.db and settings.json across restarts
+      - ./data:/app/data
+    environment:
+      - NODE_ENV=production
+      # All service URLs/API keys can be configured via the Settings UI after
+      # first boot. Uncomment below to provide them via env instead.
+      # - SEERR_URL=
+      # - SEERR_API=
+      # - RADARR_URL=
+      # - RADARR_API=
+      # - SONARR_URL=
+      # - SONARR_API=
+      # - TAUTULLI_URL=
+      # - TAUTULLI_API=
+      # - DISCORD_WEBHOOK=
+      # - NODE_TLS_REJECT_UNAUTHORIZED=0

next.config.ts

@@ -1,7 +1,7 @@
 import type { NextConfig } from "next";
 
 const nextConfig: NextConfig = {
-  /* config options here */
+  output: "standalone",
 };
 
 export default nextConfig;