automate docker build

Docker: Moved dockerfile to .build to follow web layout. added github workflow to create docker container. (#10)

.build/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.23-alpine AS builder
+FROM golang:1.26-alpine AS builder
 WORKDIR /app
 COPY go.mod go.sum ./
 RUN go mod download

.github/workflows/docker-publish.yml

@@ -0,0 +1,49 @@
+name: Build and Publish Docker Image
+
+on:
+  push:
+    branches: [main]
+    tags: ["v*"]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels)
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=sha
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: .build/Dockerfile
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

docker-compose.yml

@@ -1,62 +0,0 @@
-services:
-  app:
-    build: .
-    env_file: .env
-    ports:
-      - "8080:8080"
-    depends_on:
-      postgres:
-        condition: service_healthy
-      redis:
-        condition: service_healthy
-    restart: unless-stopped
-
-  postgres:
-    image: postgres:16-alpine
-    environment:
-      POSTGRES_USER: tower
-      POSTGRES_PASSWORD: tower
-      POSTGRES_DB: tower
-    volumes:
-      - postgres_data:/var/lib/postgresql/data
-      - ./db/migrations:/docker-entrypoint-initdb.d:ro
-    ports:
-      - "5432:5432"
-    healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U tower"]
-      interval: 5s
-      timeout: 5s
-      retries: 5
-    restart: unless-stopped
-
-  redis:
-    image: redis:7-alpine
-    volumes:
-      - redis_data:/data
-    ports:
-      - "6379:6379"
-    healthcheck:
-      test: ["CMD", "redis-cli", "ping"]
-      interval: 5s
-      timeout: 5s
-      retries: 5
-    restart: unless-stopped
-
-  caddy:
-    image: caddy:2-alpine
-    ports:
-      - "80:80"
-      - "443:443"
-    volumes:
-      - ./Caddyfile:/etc/caddy/Caddyfile:ro
-      - caddy_data:/data
-      - caddy_config:/config
-    depends_on:
-      - app
-    restart: unless-stopped
-
-volumes:
-  postgres_data:
-  redis_data:
-  caddy_data:
-  caddy_config: