ci/cd: add container workflow

Author: sudomateo

.github/workflows/container.yaml

@@ -0,0 +1,36 @@
+---
+name: Build and Push Container
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  container-build-push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build and Push Container
+        uses: docker/build-push-action@v6
+        with:
+          file: Containerfile
+          push: true
+          tags: |
+            ghcr.io/sudomateo/yeetcode:latest
+            ghcr.io/sudomateo/yeetcode:${{ github.sha }}
+          platforms: |
+            linux/amd64
+            linux/arm64

Containerfile

@@ -0,0 +1,18 @@
+FROM golang:1.24.0 AS builder
+
+ARG TARGETARCH
+
+WORKDIR /app
+COPY go.mod go.sum .
+RUN go mod download
+
+COPY . .
+RUN CGO_ENABLED=0 go build -v -trimpath -ldflags='-extldflags=-static -w -s' .
+
+FROM debian:bookworm-slim
+
+RUN apt-get update -y && apt-get install -y ca-certificates
+
+COPY --from=builder /app/yeetcode /usr/bin/yeetcode
+
+CMD ["yeetcode"]