refactor(docker): rework docker

- Move Docker files to own directory (tidier since I added several more files)
- Optimise images and reduce size
  - Uses multi-stage builds
  - Optimises layer efficiency
  - Uses NGINX as base for frontend
- Sets default env vars
- Uses tini for proper signal handling

backend/Dockerfile

@@ -1,22 +0,0 @@
-FROM node:lts-alpine
-
-RUN apk add --no-cache openssl
-
-WORKDIR /app
-
-COPY backend/package*.json ./
-
-RUN npm install --only=production
-RUN npm install -g prisma
-
-COPY backend/ .
-
-COPY agents/ ./agents
-
-RUN npx prisma generate
-
-RUN mkdir -p logs
-
-EXPOSE 3001
-
-CMD ["sh", "-c", "sleep 10 && npx prisma migrate deploy && npm start"]

docker/backend.Dockerfile

@@ -0,0 +1,45 @@
+FROM node:lts-alpine AS builder
+
+RUN apk add --no-cache openssl
+
+WORKDIR /app
+
+COPY --chown=node:node package*.json /app/
+COPY --chown=node:node backend/ /app/backend/
+
+WORKDIR /app/backend
+
+RUN npm ci &&\
+    npx prisma generate &&\
+    npm prune --omit=dev &&\
+    npm cache clean --force
+
+FROM node:lts-alpine
+
+ENV NODE_ENV=production \
+    ENABLE_LOGGING=true \
+    LOG_LEVEL=info \
+    PM_LOG_TO_CONSOLE=true
+
+RUN apk add --no-cache openssl tini curl
+
+USER node
+
+WORKDIR /app
+
+COPY --from=builder /app/backend /app/backend
+COPY --from=builder /app/node_modules /app/node_modules
+COPY --chown=node:node agents ./agents
+COPY --chmod=755 docker/backend.docker-entrypoint.sh ./entrypoint.sh
+
+WORKDIR /app/backend
+
+EXPOSE 3001
+
+VOLUME [ "/app/agents" ]
+
+HEALTHCHECK --interval=10s --timeout=5s --start-period=30s --retries=5 \
+  CMD curl -f http://localhost:3001/health || exit 1
+
+ENTRYPOINT ["/sbin/tini", "--"]
+CMD ["/app/entrypoint.sh"]

docker/backend.Dockerfile.dockerignore

@@ -0,0 +1 @@
+**/env.example

docker/backend.docker-entrypoint.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# Enable strict error handling
+set -e
+
+# Function to log messages with timestamp
+log() {
+    echo "[$(date +'%Y-%m-%d %H:%M:%S')] $*" >&2
+}
+
+log "Starting PatchMon Backend..."
+
+log "Running database migrations..."
+npx prisma migrate deploy
+
+log "Starting application..."
+exec npm start

docker/frontend.Dockerfile

@@ -0,0 +1,24 @@
+FROM node:lts-alpine AS builder
+
+WORKDIR /app
+
+COPY package*.json ./
+COPY frontend/package*.json ./frontend/
+
+RUN npm ci
+
+COPY frontend/ ./frontend/
+
+RUN npm run build:frontend
+
+FROM nginxinc/nginx-unprivileged:alpine
+
+ENV BACKEND_HOST=backend
+ENV BACKEND_PORT=3001
+
+COPY --from=builder /app/frontend/dist /usr/share/nginx/html
+COPY docker/nginx.conf.template /etc/nginx/templates/default.conf.template
+
+EXPOSE 3000
+
+CMD ["nginx", "-g", "daemon off;"]

docker/frontend.Dockerfile.dockerignore

@@ -0,0 +1,2 @@
+**/Dockerfile
+**/dist

docker/nginx.conf.template

@@ -0,0 +1,63 @@
+server {
+    listen 3000;
+    server_name localhost;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    tcp_nopush on;
+    gzip on;
+    gzip_vary on;
+    gzip_min_length 1024;
+    gzip_types
+        text/plain
+        text/css
+        text/xml
+        text/javascript
+        application/javascript
+        application/xml+rss
+        application/json
+        application/xml;
+
+    # Security headers
+    add_header X-Frame-Options DENY always;
+    add_header X-Content-Type-Options nosniff always;
+    add_header X-XSS-Protection "1; mode=block" always;
+    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+
+    # Handle client-side routing
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # API proxy
+    location /api/ {
+        proxy_pass http://${BACKEND_HOST}:${BACKEND_PORT};
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+
+        # CORS headers for API calls
+        add_header Access-Control-Allow-Origin * always;
+        add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS" always;
+        add_header Access-Control-Allow-Headers "DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization" always;
+
+        # Handle preflight requests
+        if ($request_method = 'OPTIONS') {
+            return 204;
+        }
+    }
+
+    # Static assets caching
+    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+
+    # Health check endpoint
+    location /health {
+        access_log off;
+        return 200 "healthy\n";
+        add_header Content-Type text/plain;
+    }
+}

frontend/Dockerfile

@@ -1,16 +0,0 @@
-FROM node:lts-alpine
-
-WORKDIR /app
-
-COPY package*.json ./
-
-RUN npm install
-
-COPY . .
-
-RUN npm run build
-RUN npm install --only=production
-
-EXPOSE 3000
-
-CMD ["node", "server.js"]