Docker build wf

Dockerfile

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+# syntax=docker/dockerfile:1.6
+
+# --- Build stage ------------------------------------------------------------
+FROM alpine:3.20 AS builder
+
+# Example: building a tiny binary (optional)
+RUN apk add --no-cache bash curl
+
+WORKDIR /app
+COPY . .
+
+# Just a placeholder “build” step
+RUN echo "Building example project..." && \
+    echo "version: $(date -u +%Y-%m-%dT%H:%M:%SZ)" > version.txt
+
+# --- Runtime stage ----------------------------------------------------------
+FROM alpine:3.20
+
+LABEL org.opencontainers.image.title="CI/CD Test Image" \
+      org.opencontainers.image.description="Sample image to test Gitea Actions Docker build & push workflow" \
+      org.opencontainers.image.licenses="MIT"
+
+# Copy artifact from builder
+COPY --from=builder /app/version.txt /usr/local/share/version.txt
+
+RUN apk add --no-cache bash curl && \
+    echo "Hello from the test image" > /usr/local/share/message.txt
+
+ENTRYPOINT ["/bin/sh", "-c", "echo 'Container started ✅'; cat /usr/local/share/message.txt; cat /usr/local/share/version.txt"]